Those feeding a fresh diet, whether it’s raw, or lightly cooked, will notice their pet’s meals contain offal. Offal is one of the important elements to include in your carnivorous pet’s meals. Here at My Pet Nutritionist, we wanted to highlight this element of the diet, and explain it’s importance! Is My Pet A Carnivore? Dogs and cats are both carnivorous species; however they are different types of carnivore. Cats are obligate carnivores, meaning their diet should be made purely from meat, offal and bone. Dogs are facultative carnivores, which means they predominantly eat a meat based diet, but may benefit from the addition of plant matter. Offal is essential in the diet of both cats, and dogs. What is Offal? When we speak about offal, many people may think back to their biology lesson days, or the packet of giblets and organs that comes with their Christmas turkey! These organs are offal, to some extent; but in the raw/fresh pet food world, we need to be a little more specific! In the world of pet food, when we refer to ‘offal’, we actually mean ‘secreting offal’. ‘Secreting’ means ‘produces a useful substance’; so secreting offal, is organs which produce a substance used by the body. Secreting offal includes: Liver Kidney Spleen Pancreas Testicle Brain We, humans, may think of heart, lung, and tripe as ‘offal’ – which in human terms, it is; however these are classed as muscle meat when talking about a fresh diet for pets. The heart pumps blood through the body, the lungs bring oxygen into the body and rids the body of unwanted carbon dioxide, and tripe is the lining of the stomach. None of these organs produce their own useful substance, so are not classed as offal in the raw diet. How Much Offal Do I Feed? For healthy pets, they require 10% offal in their diet. No more than 5% of this should be liver, due to it being incredibly nutrient dense – it really is a powerhouse! The rest of the raw diet should be 80% muscle meat, and 10% bone. In a fresh cooked diet, it’s important to follow a recipe balanced to FEDIAF, like ours! What is the Role of Offal in the Diet? Offal provides numerous vitamins and minerals; we will discuss what each organ provides! All offal is high in moisture, which really helps keep the dog’s kidneys from being under stress, and reduces the risk of UTIs. Each organ fed, provides benefits to the same organ within the dog’s body too! Liver offers a huge amount of fat-soluble Vitamin A, which is essential for healthy vision, healthy growth and development, and support of the immune system. Liver contains large amounts of water-soluble Vitamin B2, which is responsible for metabolism of fats, proteins and carbohydrates. Vitamin B12 is found in abundance in liver, which keeps nerve and blood cells in good condition, as well as being involved in the body’s production of DNA. As liver contains so much of these vitamin, it’s important to include in the diet, but not to feed more than 5% of the entire diet. Liver is a great source of Copper; the mineral responsible for keeping the nervous system healthy, keeping blood cells healthy, and aiding the immune system. Findings Here Kidney is a great source of the mineral, Selenium. Selenium protects cells against damage and infection, and also aids the production of DNA. Kidney contains a wide range of B vitamins, including B1, B2, B6 and B12. B6 is very important for brain function, as it controls the level of homocysteine; an amino acid associated with cognitive decline when found in large amounts. Vitamin D is found more in kidney than any other organ, and is essential for regulation of calcium and phosphate in the body, which keep bones, muscles and teeth in good condition. Findings Here Spleen contains high concentrations of iron. Iron is essential for many bodily functions, including haemoglobin production, myoglobin production, as well as production of many hormones. Vitamin B12 can be found in relatively large amounts in spleen, and is also very high in tryptophan; the amino acid which aids the sleep cycle, through regulation of serotonin and melatonin. The liver uses this amino acid for production of Vitamin B3, which is essential for DNA production. Findings Here Pancreas is one of the higher fat offal options. It doesn’t contain any particularly notifiable amounts of vitamins or minerals, but it does offer a range of very useful digestive enzymes. It may be worth considering feeding pancreas as part of a balanced diet if your dog has a sensitive stomach, and requires a little extra digestive help. One study shows replacing ‘lecithin’ in the commercial diet of a dog with lack of pancreatic function, with raw pancreas, is massively beneficial! Findings Here Testicles (yes, we said testicles! Chuckle, if you wish – we do! Some readers may wish to cross their legs when reading this section!) are a great source of vitamin B12, and are also high in protein, and very low in fat. They contain a great amount of sodium too, which is essential for health contraction and relaxation of muscles throughout the body. Chloride is also in abundance in testicles, which along with sodium, regulates the mineral uptake and hydration of the body. Findings Here Brain is a great option for your pet, though contains the same amount of fat as it does protein. Unlike any other offal, brain is a fantastic source of essential fatty acids. The Omega-3 Fatty Acid, DHA, is a natural anti-inflammatory, which is usually found in fish and raw eggs. Brain contains huge amounts of DHA, which is excellent for brain health and cognitive development. A fantastic choice for all dogs, but especially growing puppies, and senior dogs who may be prone to cognitive decline. Findings Here When is a Low Offal Diet Required? Very occasionally, some dogs may require a diet lower in offal than others; namely those requiring
Our feline friends can often be left out when we talk about enrichment for pets – we notice plenty of top tips for our dogs, but sometimes end up a little lost when it comes to our cats. So, how can we enrich our cat’s life? We’ve popped together some ideas. Species Appropriate Diet Cats have evolved as hunters that consume prey containing high amounts of protein, moderate amounts of fat, and minimal amounts of carbohydrates. The cat has seemingly evolved as a strict or obligate carnivore; meaning the nutrients they require are found in animal tissue. As such, the consensus is that there is no current nutritional basis for energy to be supplied by carbohydrates; providing other nutrients are being supplied. There is also evidence that there is limited amylase activity in the pancreas and small intestine (even compared to dogs), which may explain why some cats will not tolerate high starch diets. The fact that cats are also defined as hypercarnivores (small carnivorous mammal with a proportionally large brain) indicates they have a high brain glucose demand. This high demand simply could not be met by carbohydrates present in a natural prey diet; and so, cats therefore have a higher rate of gluconeogenesis (the production of glucose from non-carbohydrate sources). It is considered that due to the limited intestinal enzyme capacity, consumption of excessive amounts of digestible carbohydrates will not lead to glucose absorption, but rather a substrate for increased microbial fermentation, causing gastrointestinal adverse effects. In similar tests to dogs, cats are able to target their nutrient intake. When given the choice, they will specifically aim for a high intake of protein. In times of low protein, they will opt for an increased fat intake to achieve balance. When carbohydrate intake was high, this limited intake of other nutrients and resulted in deficits – for that reason, a carbohydrate ceiling was proposed for the cat. What this means, is that your cat will thrive best on a fresh food diet, high in protein and moderate in fat. If you find you have a fussy eater, sometimes engaging in play before mealtimes can mimic you cat’s natural prey drive and increase interest in food. Findings Here Limit Toxin Exposure Whenever the body is exposed to something, it must do something with it. In the case of toxic substances, it must make it less toxic, hence the word detoxification (de=remove or reverse). Detoxification pathways fall into three phases. The first two phases are concerned with breaking down the toxin in the body, and phase three is concerned with excreting it. For us to manage ours and our cat’s toxic load, all three phases need to be working optimally. Phase one is particularly nutrient demanding, and it produces a lot of reactive oxygen species in the process (those cheeky things that result in oxidative damage which destroys and damages cells). Phase two is also nutrient demanding, but drafts in many different processes depending on the compounds being detoxified. Phase three deals with getting rid of them once and for all, and occurs in the gut, skin, liver and kidneys. So, it stands to reason that optimal organ function is helpful here. The issue is that the cat is playing catch up. They aren’t as efficient at these processes as other species, like us, and when we are increasing the toxin burden year on year, it becomes problematic. They have even demonstrated a total inactivation of certain genes responsible for certain phenol detoxification. So, whilst limited toxin exposure is important for us all, it’s even more important for our cats. Where possible, limit exposure to: Plastics Mould Smoke Air pollution Heavy metals VOCs – air fresheners, cleaning products, fabric softeners The Struggle of The Cat in Our Toxic World Is Your Toxic Home Affecting Your Pet Allow Them To Engage in Normal Behaviour All cats are different. They have different energy levels and how they behave will depend on their age, breed and past experiences. But there are a few things that we need to ensure for all cats, no matter what. make sure your cat receives enough mental, social and physical stimulation to satisfy their individual behavioural needs provide your cat with safe toys and regular opportunities to play with friendly people and by themselves make sure that your cat can rest undisturbed if they want to make sure your cat has opportunities to exercise each day provide suitable indoor activities to keep your cat active, if they don’t go outside make sure that your cat can reach all the things that it needs (for example bed, food, water, litter or outdoors) without having to get too close to things, people or other animals that may scare them make sure children allow cats to exhibit normal behaviours too. Let Them Hide Cats get stressed. There is no denying that. But they are often a little more subtle in their anxieties than other animals. As in humans, cats will have the same response to stress. They may choose to fight, flight, or freeze. When they fight, they become aggressive and defensive. Flight will see them withdrawing from the threat and perhaps running away. When cats freeze, they crouch, lie still, and try to avoid any attention. There is a ladder of response in most animals, and this is no different in cats. They will often show subtle signs of discomfort or stress. If the trigger doesn’t disappear, the behaviour will progress. You may start with the flat ears, then the pupils will dilate. You may have a low growl or a silent hiss. Them running off or lashing out with their teeth and claws may be a few steps up the ladder. For some cats, there are triggers which they can’t easily escape from. The most common is a multi-pet home. It is well-established that those cats exposed to dogs report higher stress-hormone levels in their urine. However, some cats have incredible relationships with resident dogs. Generally, if the cat
There is a common misconception in the feline world. Many of us will see a hiding cat and make it our mission to coax them out. Whether this is whilst visiting a friend or taking in a new addition and they shoot straight under the cooker. We want them to come out so we can scratch under their chin. We want to reassure them. But what if we were to tell you that the welfare of said cats is greatly improved when they are given the opportunity to hide? Our want to reassure the cat is largely misplaced. We like to think we can fix it; but sometimes giving these cats the opportunity to decompress will fix more than our head poking under the bed with a handful of cooked food! To support the stressed cat we need to think outside of the box, or inside, as this case may be. Stress in Cats Cats get stressed. There is no denying that. But they are often a little more subtle in their anxieties than other animals. As in humans, cats will have the same response to stress. They may choose to fight, flight, or freeze. When they fight, they become aggressive and defensive. Flight will see them withdrawing from the threat and perhaps running away. When cats freeze, they crouch, lie still, and try to avoid any attention. At this point, you are probably imagining an outdoor cat with a territory to protect or one who has run into some difficulty on their hunt. But cats can become stressed for many reasons. They may spot an intruder (from the comfort of their windowsill), furniture may have moved, their litter may be different because the pet shop ran out of their usual one or there may be guests in the home and suddenly the day to day routine has drastically changed. You then have the colossal life changing events like bringing another new pet into their home, or them being the new addition to a busy home. The personality of the cat will largely determine how they respond to stress, much like in humans. Friendly and bold cats will often be more resilient in the face of change or stress; these are the cats who have generally experienced positive early socialisation, exposure to novel experiences and regular human handling. Interestingly, those cats who have a friendly father tend to grow up experiencing less distress in novel situations. Findings Here But it also seems that the personality of the owner can affect how a cat responds to stressful situations. If we explore the Big Five Inventory for human personality, owners who score high on neuroticism (who are more likely to feel anxious, worry and fear) report that their cats are more aggressive, anxious, and fearful. Owners who score high on conscientiousness report their cats are less anxious, fearful, aggressive, aloof, and avoidant. Those who are conscientious are often defined as organised and we know that a consistent routine is a great way to reduce stress-related behaviour in cats. Findings Here Studies like this include largely self-reported data, so the behaviour of both owner and cat could merely be perception, but it gives food for thought most certainly. Spotting Stress in Cats Cats can be incredible at hiding their emotions. This would have been an evolutionary advantage – no-one can prey on a weakness if they can’t see it. But there are subtle behaviours which show us they aren’t particularly fond of a situation. Immobility (freeze response) Crouched body Laying flat on their belly Tail under their body Wide eyes Flat ears Meowing, yowling, growling Hissing Shaking Excessive salivating Involuntary toileting Some cats will attempt to make themselves look bigger by way of piloerection. Their hand stands on end along their back, but more commonly you’ll notice a suddenly bushy tail. In dogs we notice this as getting their “hackles” up. This is an involuntary nervous system response because of the circulating adrenaline which makes the muscles contract. Be mindful though, cats will also do this if they are cold or aroused, so assess the situation to establish if it’s stress related or not. Again, this makes total evolutionary sense; a predator would think twice about hunting a larger prey. There is a ladder of response in most animals, and this is no different in cats. They will often show subtle signs of discomfort or stress. If the trigger doesn’t disappear, behaviour will progress. You may first notice flat ears, then the pupils will dilate. You may have a low growl or a silent hiss. Them running off or lashing out with their teeth and claws may be a few steps up the ladder. Chronic Stress For some cats, there are triggers which they can’t easily escape from. The most common is a multi-pet home. It is well-established that those cats exposed to dogs report higher stress-hormone levels in their urine. However, some cats have incredible relationships with resident dogs. Generally, if the cat is the first to arrive in the home, the cat-dog relationship will be more comfortable, and indoor cats are more likely to live amicably with dogs, than outdoor cats. Interestingly, it is usually the cat that is the driver of any aggressive encounters with dogs. In short, the cat will call the shots on whether the relationship is harmonious or not. Findings Here In a multi-cat home, it is much the same. Some cats cohabit perfectly well, but others may not. Strained relationships can result in excessive grooming, indoor soiling, spraying and even urinary retention, commonly resulting in conditions like cystitis. Cats may also self-soothe by way of sleeping and eating, so they may start to gain unnecessary weight. This is where the idea of learned helplessness appears. This is the “why bother?” concept of managing stressful situations. After repeated exposure to a stressor, the animal perceives they are unable to control or change it, so they stop trying. It’s easy to spot the acute stress
Whilst we thought we were leaving acne behind in our teenage years, sadly, our feline friends can and do suffer with it. Appearing as red bumps, black dots or dirt on your cat’s chin, cat acne is the result of the hair follicles (more commonly the ones on their chin) becoming “plugged!” There are a number of reasons why this condition affects cats, so let’s take a look at it in a little more detail, with some of our top tips to tackle it. What is Cat Acne? Cat acne is more technically termed follicular keratinization. This is when there is an over production of keratin which is a protein found in the outer layer of skin. This excess keratin becomes trapped in the hair follicle and starts to form pustules or pimples. Cat acne is similar to human acne; characterised by the development of folliculitis (inflammation of the hair follicle). What are the Signs and Symptoms of Cat Acne? Dirty appearance on the chin Lesions on the chin Blackheads/infected follicles Swollen lips What is particularly interesting is that cats can experience acne on other parts of their body too, but it is more common on their chin. Potential Causes of Cat Acne The Skin’s Immune Barrier Function The skin is the largest organ of your cat’s body. It consists of three major layers: The Epidermis – (Epi – upon or above) this is the outer layer of skin, the protective layer. The Dermis – the dermis supports and nourishes the outer layer. It provides strength and elasticity. Here you will find collagen fibres, sweat glands, sebaceous glands, and hair follicles. You will also find cells that release histamine and other inflammatory mediators when faced with an allergy or injury. The Subcutis – (sub meaning under or below) this in the innermost layer of the skin, where you will find fat and muscles. Subcutaneous fat provides insulation, padding and storage for reserve energy. Not only does the structure of the skin prevent water and electrolyte loss to help maintain body homeostasis, but it forms a protective barrier which helps protect against infections, parasites, and the elements. This is the often-forgotten role of the skin – that it forms part of the immune system. If this barrier is compromised, we start to see issues on the surface (in the form of skin disease), along with body wide inflammatory issues. What Can Compromise the Skin Barrier? Over-grooming This can be a common behaviour in a stressed cat. They may over-groom in an attempt to soothe. You will notice bald patches, but once your cat has removed their hair, it wont be long until they start compromising their skin too! Watch for signs of stress in your cat, they may become more withdrawn than usual, they may hide more often or become less tolerant of people. In more severe cases they may toilet in inappropriate places. Pheromone diffusers can be great options to help calm a stressed cat, but also giving them plenty of opportunities to hide. In shelter environments, cats have noted huge reductions in stress-related behaviours in less than 10 days, when they have been allowed to hide. It also didn’t affect their ability to be rehomed. In short, those cats allowed to hide were less-stressed, more eager to approach strangers and more active. Findings Here Cats are largely solitary animals. They have always marked their territories by way of scent. They rub their facial glands around their environment and also mark by way of urine, faeces and anal glands. Not only does hiding allow them to watch for threats from one direction only, (the one way into the box) it is also a confined space where they are very quickly surrounded by their own scent. The key is to have ample hiding spaces. So, if you have more than one cat, they each need their own space to hide. Free from dogs, children and other territory intruders. You could simply place carboard boxes around your home, perhaps in the usual places your cat chooses to hide, or you can buy activity centres with boxes attached. Cocoon style beds are also perfect; just remember to buy one with removable, washable covers. Overgrooming can also be a sign of boredom – it often becomes more common in winter, when cats are spending more time indoors. If this is a concern, provide plenty of opportunities for your cat to engage in natural behaviour, within the home. Study after study shows us that enriched environments reduce the stress-hormone found in stressed cat’s urine considerably. Allergens If pesky allergens or irritants come into contact with the body, they soon feel the full wrath of the immune response. What starts with inflammation, will venture to a targeted attack in order to eradicate the invader. But this does consist of redness, heat, and pain. This can result in pets scratching in an attempt to remove the less than comfortable inflammatory response. In the process, not only has the skin been exposed to an allergen, resulting in an inflammatory response, but paired with scratching, the skin barrier is compromised further, which then becomes a vicious cycle. Remove potential allergens from the home where possible, this can be the washing detergent you use on fabrics and cat beds, to the bowl your cat eats and drinks from. Ceramic or glass plates often bring great relief to cats suffering with cat acne. As plates are flat, they are also in less contact whilst eating. The same also applies to the food you feed your cat. As we know, a huge number of immune cells are found in the gut – what this means is that the gut trains the immune system in what to respond to, and what to ignore. When we feed a food high in antigenic compounds, the immune system responds in true inflammatory style! Not only this but there is a direct link between the gut and skin health – when gut health is compromised, we
Obesity is one of the most common issues that cat owners bring to My Pet Nutritionist with good reason. We know that being overweight increases the risk factors for developing: Cancer Diabetes Heart disease Osteoarthritis and degeneration of joints Urinary issues Surgery complications Respiratory difficulties Kidney disease In a nutshell, being overweight significantly compromises quality of life and actually, the length of it too! So, let’s take a look at some of the common reasons why your cat may be overweight, and we’ll share our top tips for tackling obesity in cats. Is Your Cat Overweight? Obesity is defined as an accumulation of excessive amounts of adipose tissue. It is generally a state of positive energy balance. When food is ingested, it is digested and metabolised. The body uses the nutrients it needs and converts the main macronutrients to energy. Macronutrients consumed over and above those that are needed, are converted into adipose tissue, for use at a later stage. Cat body scores run from 1-9. Ideal bodyweights score 4-5, ribs are not visible but easily palpable, there is an obvious waist and there is minimal/small amount of abdominal fat. Body scores are a much more appropriate approach to establishing body proportion in cats as weight doesn’t accommodate for breed differences or activity levels. Your cat is overweight if: Ribs are difficult to palpate under body fat, Waist barely visible or absent, There is rounding of the abdomen. Why is My Cat Overweight? Perception Do you know your pet is overweight? In an 8000-household study, 68% of surveyed owners report thinking their pet is the perfect weight. 67% of surveyed owners did not see obesity as a concern. This is in contrast to that reported by vets, who show concern that over half of all pets are overweight. Do we simply not see that our pet is overweight and therefore aren’t employing any tactics to manage it? Food Intake Most foods on the market include a feeding guideline based on weight. One of the most common mistakes made by owners is to feed based on the current weight of their pet, not the ideal weight (when tackling a weight issue). Not only that, but weight is a bit of a misnomer anyway. With so many different breeds it is difficult to establish standardisation. It’s important to feed the pet in front of you. Energy requirements vary depending on lifestyle, age, activity, and time of year. Cats for example may be less active in the winter. The type of food you are feeding your pet will also play a part. Starch is the storage from of carbohydrates found in plants and as we know, dry pet foods have large quantities of starch. Starch can be divided into rapidly digestible starch, slowly digestible starch and resistant starch. Rapidly digestible starch can be produced by the exposure to heat, pressure, or moisture decrease (read: exactly what happens during pet food manufacturing). Rapidly digestible starch results in a blood sugar spike, calling the pancreas to action. Insulin shuttles glucose into cells that need it, but also facilitates its entry into adipose tissue! Insulin also stops the breakdown of fat and prevents the breakdown or triglycerides into fatty acids (causing a build-up in fat cells). This is why we always advocate feeding a fresh food diet. Cats are obligate carnivores; in that they get everything they need from animal tissue. Quite often, removing a dry food from a cat’s diet results in significant weight improvement. It’s a Family Affair One of the biggest challenges with feeding cats is getting everyone in the home on board. Cats tend to tell everyone in the home that they still haven’t been fed! This results in many mealtimes, served by many different family members. To tackle this, work out an appropriate food intake in any one day and portion this into a Tupperware. Ensure all family members understand this – when the food has gone, the food has gone – if most of the food has gone by lunchtime, what’s left needs to be kept until dinnertime! Account for Physical Activity We have a nuance in the cat. Some are indoor cats, where others are outdoor cats. This brings a significant difference in activity levels. Whilst the calorie in:calorie out model of obesity is simplistic, it is a consideration to make. For the indoor cat who engages in little physical activity, their food intake may need to be significantly lower than thought. We can enrich their lifestyle with more opportunities for exercise; through activity centres or play but we should also consider reducing their food intake if they are becoming overweight. We should also account for mobility challenges in the ageing cat and how this will influence their nutrient needs. Treat Intake Keep a log on how many treats you are offering your cat, whether it’s scraps from your plate or treats you have bought in. These are easy to nip in the bud if you are trying to manage your cat’s weight; the key is to ensure your cat is satiated from their mealtimes. Cats Are Not Small Dogs Be Mindful of Behaviour For some cats, being demanding can be a problematic behaviour rather than a request for nutrients. Does your cat have plenty of opportunities to engage in their normal behaviour? Do they have access to safe toys and regular opportunities to play with both people and by themselves? Can they rest, undisturbed when they choose? Can they meet their basic needs easily? Can they access food, water, beds, and litter without being disturbed or scared by other pets/people? Obesity in cats is a significant concern, and one that can impair their health and lifespan. Our top tips include: Opt for a fresh food diet (ditch the dry!) Feed the cat in front of you, based on their age, activity level and lifestyle Get the whole family on board If you would like to learn more about obesity in pets, we have a number of other
We are often told that pet ownership has health benefits, the seminal work of Friedmann and colleagues in 1980 demonstrated that pet owners who suffered a heart attack were four times more likely to survive than their non-pet owning counterparts. But we generally consider that these pet owners, in fact own dogs, and with their increase in physical activity due to the exercise requirements of the dog, it’s not a far stretch to correlate dog ownership with better physical health. However, there is more and more data suggesting that cats too can improve our physical health, and most certainly our mental health. So, could there be more to us keeping these feisty, stubborn, and wholly independent beings in our lives? Here at My Pet Nutritionist, we thought we’d look into it in a little more detail. Cats and Stress It seems that cat owners on the whole, are calmer when faced with stressful situations and recover much quicker than non-cat-owners. The main theory behind this is that social support provides a buffer for stress; and it does, we know that having strong social networks in times of stress can mitigate the harmful effects, but it seems that cats, and pets on the whole, provide even more of a buffer. It is thought that cats, unlike humans are non-judgemental (although many cat owners would disagree here), so not only are they a support, we’re also not worried about what they think of us. We also find their purr relaxing. Whilst it would be great to find some complex data to suggest that the frequency of the purr helps us to relax, the reality is a little less glamourous. When we are sat next to our cat or they are on our lap, we instinctively pick up on their purr. We’ll make a fuss and listen. Quite often we start to eliminate outside noise, literally and metaphorically. Whilst we’re focussing on their purr, we’re not thinking about that extended to do list, or that deadline we’ve got to make in work. We are simply there, listening to a purr. It’s a less intentional form of mindfulness. In it’s basic definition, mindfulness is about bringing your focus to what you’re sensing or feeling at that moment. Some owners will naturally change their breathing, slowing it down to mirror their cat. This action stimulates the vagus nerve which is the chief of the parasympathetic nervous system. This system is our rest and digest system, the one that counters our fight and flight. So, often without even realising it, simply sitting, in the moment with the cat, listening to their purr, we have moderated our stress response. This will also apply when we are watching them roll over in the sunshine, or play with their toys, we are simply being with them, nothing more, nothing less. Cats and Relationships Whilst we’ve all heard the phrase, crazy cat person, it seems that when assessed against personality factors, cat owners are more socially sensitive, trusting and like other people more than non-cat owners. As we mentioned earlier, social support is a buffer in times of stress, so it could be suggested that as cat owners tend to get on with other people more, they have a better social network, providing more of a buffer, therefore making them more resilient in tough times. So, whilst owning a cat is not directly linked to better relationships, people who choose to own cats tend to possess personality traits that help them experience quality relationships. Findings Here This could largely be due to the hormone oxytocin. This hormone plays a role in social bonding, reproduction, childbirth, and the period after childbirth. In humans it is seen to increase when touched, when we watch an emotional movie or engage in group activities. Humans have many oxytocin receptors compared to other animals, demonstrating our need for social interaction; affecting our central nervous system and peripheral nervous system, oxytocin is a key player in reducing stress hormones. Oxytocin is known to increase when petting both cats and dogs, and it has been demonstrated that this increase, subsequently enhances trust of a stranger, meaning cat owners may be more likely to engage in new social relationships and increasing that social network. Cats and Sleep Study after study have demonstrated that cat owners report they are happier, more confident, less nervous, more energetic, attentive, and less lonely. They also report they sleep and focus better than non-cat owners. Findings Here All of this could in fact be due to our sleep cycles as a cat owner. Humans function on a circadian rhythm, which is around a 24-hour sleep-wake cycle. Without going into the ins and outs of it, without a sleep drive, we struggle to fall asleep. Part of this sleep drive is the accumulation of a neurotransmitter called adenosine throughout the day. To fall asleep, we respond to the hormone melatonin, which ramps up at night, in response to light cues. In short, what our body experiences throughout the day affects how we sleep that night. This is why, if anyone ever struggles to sleep, a routine is the first thing they are told to implement. And, as any cat owner will attest, cats know exactly what time breakfast is! Even if your cat doesn’t venture into the bedroom to claw at your feet for their breakfast, one of the first thoughts to cross a pet-owners mind in the morning is the need to get up and sort the cat/s/dog/s out. Without knowing, us pet owners get into a routine, very quickly. We tend to get up at the same time most days, keeping our circadian rhythm steady. If we have better sleep hygiene, we will experience more quality sleep and therefore be more energetic throughout the day, and likely be more focussed. So inadvertently, pet ownership results in a routine which keeps our sleep on track. There is also the consideration that some owners allow their pets to sleep on the bed with
It turns out September is Happy Cat Month. Now, if you’re like us here at My Pet Nutritionist, we sometimes get a little lost if certain appreciation days are National or International, but either way, what better time to share some of our top tips for keeping your feline friend both happy and healthy? 1) Species Appropriate Diet Cats have evolved as hunters that consume prey containing high amounts of protein, moderate amounts of fat, and minimal amounts of carbohydrates. The cat has seemingly evolved as a strict or obligate carnivore; meaning they nutrients they require are found in animal tissue. As such, the consensus is that there is no current nutritional basis for energy to be supplied by carbohydrates; providing other nutrients are being supplied. There is also evidence that there is limited amylase activity in the pancreas and small intestine (even compared to dogs), which may explain why some cats will not tolerate high starch diets. The fact that cats are also defined as hypercarnivores (small carnivorous mammal with a proportionally large brain) indicates they have a high brain glucose demand. This high demand simply could not be met by carbohydrates present in a natural prey diet; and so, cats therefore have a higher rate of gluconeogenesis (the production of glucose from non-carbohydrate sources). It is considered that due to the limited intestinal enzyme capacity, consumption of excessive amounts of digestible carbohydrates will not lead to glucose absorption, but rather a substrate for increased microbial fermentation, causing gastrointestinal adverse effects. In similar tests to dogs, cats are able to target their nutrient intake. When given the choice, they will specifically aim for a high intake of protein. In times of low protein, they will opt for an increased fat intake to achieve balance. When carbohydrate intake was high, this limited intake of other nutrients and resulted in deficits – for that reason, a carbohydrate ceiling is proposed for the cat. Findings Here 2) Limit Toxin Exposure Whenever the body is exposed to something, it must do something with it. In the case of toxic substances, it must make it less toxic, hence the word detoxification (de=remove or reverse). Detoxification pathways fall into three phases. The first two phases are concerned with breaking down the toxin in the body, and phase three is concerned with excreting it. For us to manage ours and our cat’s toxic load, all three phases need to be working optimally. Phase one is particularly nutrient demanding, and it produces a lot of reactive oxygen species in the process (those cheeky things that result in oxidative damage which destroys and damages cells). Phase two is also nutrient demanding, but drafts in many different processes depending on the compounds being detoxified. Phase three deals with getting rid of them once and for all, and occurs in the gut, skin, liver and kidneys. So, it stands to reason that optimal organ function is helpful here. The issue is that the cat is playing catch up. They aren’t as efficient at these processes as other species, like us, and when we are increasing toxin burden year on year, it becomes problematic. They have even demonstrated a total inactivation of certain genes responsible for certain phenol detoxification. So, whilst limited toxin exposure is important for us all, it’s even more important for our cats. Where possible, limit exposure to: Plastics Mould Smoke Air pollution Heavy metals VOCs – air fresheners, cleaning products, fabric softeners The Struggle of The Cat in Our Toxic World Is Your Toxic Home Affecting Your Pet 3) Offer Fresh Filtered Water Cats don’t naturally have a thirst drive, they evolved to survive in hot, desert climates. But when they have access to their natural diet, a large percentage of that would contain moisture. Dry food increases thirst behaviour: this is demonstrated in dog studies time and time again, but there is still a mismatch between the cat’s evolutionary thirst (or lack thereof) and the moisture in their diet. Water is possibly the single most important nutrient for the body. 1) It functions as a solvent that facilitates reactions and also transports nutrients around the body. 2) Water is able to absorb heat from the processes occurring in the body, without the overall body temperature changing too much. 3) It further contributes to temperature regulation by transporting heat away from working organs through the blood. 4) Water is crucial in the digestive process; it is a key player in hydrolysis, which is the splitting of larger molecules into smaller molecules (through the addition of water). 5) The kidneys also use large quantities of water when eliminating waste. A high moisture diet is beneficial to the cat to ensure they are hydrated, but fresh filtered water should also be offered. As in point two, toxin exposure should be limited and even in the most developed countries there is contamination. Chlorine, heavy metals, plastic fibres and pharmaceutical compounds are regularly found in tested tap water, which all pose risks to our feline friends. The Importance of Water 4) Let them Hide! Cats get stressed. There is no denying that. But they are often a little more subtle in their anxieties than other animals. As in humans, cats will have the same response to stress. They may choose to fight, flight, or freeze. When they fight, they become aggressive and defensive. Flight will see them withdrawing from the threat and perhaps running away. When cats freeze, they crouch, lie still, and try to avoid any attention. There is a ladder of response in most animals, and this is no different in cats. They will often show subtle signs of discomfort or stress. If the trigger doesn’t disappear, the behaviours will progress. You may start with the flat ears, then the pupils will dilate. You may have a low growl or a silent hiss. Them running off or lashing out with their teeth and claws may be a few steps up the ladder. For some cats, there are triggers
Whilst we share a lot of information about dogs here at My Pet Nutritionist, we also support many cats and their owners on their health journey. It is often easy to miss health concerns with our feline friends because if they are outdoor cats, we don’t witness their toileting habits, or if they are sick. So, let’s start with what we can see; what goes in their bowl. Grab a cuppa, we are going to look at the nutritional needs of cats, and why they aren’t just small dogs. What do cats need No matter where you look, the jury is in – cats evolved as hunters that consume prey containing high amounts of protein, moderate amounts of fat, and minimal amounts of carbohydrates. Protein Proteins are the building blocks of the body. The word protein comes from the Greek word proteios which means of prime importance. And they really are. Proteins have numerous functions,they are the major structural components of hair, skin, nails, tendons,ligaments and cartilage. They are also involved in a number of physiological and chemical processes in the body like cell signalling, muscle contraction, oxygen and nutrient transport, and many reactions including enzyme and energy production. Amino acids are the basic units of proteins and are held together by peptide linkages to form long protein chains. Dietary amino acids are absorbed in the gastrointestinal tract, following disruption of the peptide bonds. They are then transported to the liver. The liver changes amino acids so they can be used by the rest of the body. They then enter general circulation. Although hundreds of amino acids exist in nature, there are some which are commonly found as protein components. They are classified as either essential or non-essential. Essential amino acids cannot be synthesised by the body so must be supplied by the diet. Non-essential amino acids, whilst still critical to bodily processes, can be synthesised within the body (when it is healthy). Deficiencies in single essential amino acids can lead to serious health problems. The one you are likely all familiar with for cats, is taurine. Cats and humans are among the few mammals whose bodies do not make taurine, and therefore must obtain it from their diet. In humans, taurine deficiency is rare because taurine is common in meat and fish food products. In the 1970’s, Quinton R. Rogers of UC Davis showed that a taurine deficiency could cause degeneration of the retina in cat’s eyes. Kittens born to taurine deficient mothers are often blind and show many abnormalities such as impaired gait. For this reason, in the 1980’s new cat feeding guidelines were introduced, stating a minimum level for taurine in cat food. But, in later years it was also found that taurine plays a role in regulating calcium entry into heart tissue every time it beats. Researchers soon noticed that cats presenting with dilated cardiomyopathy also had low levels of taurine. When taurine was supplemented in the diet,the cats recovered. Findings Here. But there is another deficiency that gets attention in cats too and that is in the amino acid arginine. This amino acid is critical to the removal of ammonia from the body through urine. Without sufficient arginine, cats may suffer from a toxic build up of ammonia in the blood stream. The urea cycle is not down regulated during periods of fasting in cats, or even when consuming low protein diets – so their dietary requirement always remains high. In cases of chronic kidney disease, arginine production is also compromised; sadly chronic kidney disease is increasing in our feline friends.If you’d like to learn more about kidney disease in cats, then check out our blog: Here Of interest is a case study of a young cat, he acquired urea cycle amino acid deficiency through inflammatory bowel disease and chronic kidney disease. Case Study It’s clear that cats need protein, and the key amino acids required are found in meat products – fish too! Cats Need Fat Too! Dietary fat is a group of compounds (substances made up of two or more elements) known as lipids. They are insoluble in water(hydrophobic). The easiest way to understand this is noticing that you can’t wash fat off your hands without the help of soap. Fatty acids can be saturated, monounsaturated, or polyunsaturated. The difference is in their structure. Fatty acids are used throughout the body for a range of functions, primarily energy, but if they are not needed, they can be stored in adipose tissue. Here, they are an energy source for a later stage. They also serve as insulation, protecting the body from heat loss and also from injury or trauma to vital organs. Certain proteins known as lipoproteins provide for the transport of fats throughout the body, and cholesterol (a type of lipid) is used to form the bile salts necessary for fat digestion and absorption. It is also a precursor for steroid hormones which help control metabolism, salt and water balance, inflammation, and immune function. Along with other lipids, cholesterol forms a protective layer in the skin, which prevents excessive water loss. The body can synthesise some of the fatty acids it needs, but there are some it cannot, and these are known as essential fatty acids. There are two essential fatty acids in dogs, and three in cats. Linoleic Acid Linolenic Acid Arachidonic acid is an essential fatty acid for the cat. These are the precursors to two families of polyunsaturated fatty acids (PUFAs) known as omega-3 and omega-6. Cats fed essential fatty acid deficient diets develop: Fatty degeneration of the liver. Mineralisation of the adrenal glands Skin lesions Inadequate visual function. It is therefore concluded thatthe inclusion of essential fatty acids in the cat contributes to: Membrane maintenance, Reproductive health, Growth, Lipid transport, Normal skin and coat condition, Maintenance of skin barrier, Blood platelet aggregation. Fish oil is often supplemented for cats – but many meat and poultry products contain necessary levels of fatty acids. Carbohydrates The cat has seemingly evolved
Evolution of the Slowest: The Struggle of the Cat in our Toxic Modern World How many of you have heard that cats are more sensitive to certain things than, dogs for example? If you are using essential oils, that you had to be particularly careful about which oils you used? It turns out there is in fact a biological reason for this sensitivity, and it is all to do with their detoxification pathways. Here at My Pet Nutritionist, we want to explore this fact. We’re not talking about putting your cat on an aloe cleanse programme, but detoxification occurs all by itself, in humans, dogs and of course cats. So, what is detoxification Everyday, ours and our pet’s bodies are exposed to toxins. They are produced internally in the body, like lactic acid and waste products from gut microbes, hormones, and neurotransmitters and externally, like air pollution, chemicals from cleaning products or volatile organic compounds from the plug-in air diffuser in your lounge. It is thought that in the 25 years between 1970 and 1995, the volume of synthetic organic chemicals produced tripled from about 50 million tonnes to approximately 150 million tons, and this number has grown year on year since. Findings here These toxins can disrupt essential biological structures in the body, and in turn result in chronic health issues. What is a toxin? A toxin is defined as any substance that must be neutralised and eliminated to avoid its promotion of ill-health if left to accumulate. This is what detoxification does. Whilst toxins are generally deemed something in which to avoid, the body is producing waste products every second of every day in the form of used hormones, neurotransmitters, or oxidised lipids. This is why even if we manage our environments well, we still need to support our detoxification system, simply to eliminate the exhaust fumes of daily life. Detoxification is carried out by a range of mechanisms and this comes in particularly handy if one pathway is overwhelmed, another can pick up the slack. We can think of it like a waterfall, water will always find a way down. In a healthy system, toxins should always be able to find a way out. Initially, the body will attempt to detoxify at source. These locations include the intestinal mucosa, the respiratory mucosa, the microbiome, and the skin epidermis. Whilst these also provide a physical barrier to prevent toxin transport, they also express a range of enzymes which are essential in sweeping toxins away. Then, detoxification falls into three phases. The first two phases are concerned with breaking down the toxin in the body, and phase three is concerned with excreting it. For us to manage ours and our cat’s toxic load, all three phases need to be working optimally. Phase I Here we are mostly concerned with a range of enzymes like MAOs or monoamine oxidases dealing with neurotransmitters (those chemical messengers involved in mood and behaviour amongst other things) and PON1 or paraoxonase 1 dealing with pesticides and oxidised lipids. The names aren’t important, but the point is, that at this stage the body needs to be efficiently producing these enzymes to metabolise the toxins. So, it stands to reason that this stage is particularly nutrient demanding and sufficient levels of key vitamins and minerals like vitamin A, C, E, B1, B2, B3 and iron, along with cysteine, are essential. This phase also generates high numbers of reactive oxygen species, or ROS, leading to oxidative stress. Once toxins have been passed through phase I, they are not yet finished with. Intermediate metabolites are produced, and they sit in the body. It’s almost like putting your rubbish in the outside bin, but missing collection day. The rubbish remains. Liver Guard Welcome to phase II Within phase II there are number of pathways and they are all responsible for detoxifying different compounds. The pathways include: Methylation deals with heavy metals, plastics, medications, mould, histamine, and hormones, amongst others. This process requires nutrients like folate, vitamin B6, zinc and magnesium. The process of sulphation deals with heavy metals, heavy smoke, hormones, neurotransmitters, plastics, phenols, and medications including antibiotics. Glutathione conjugation deals with heavy metals, plastics, mould, heavy smoke, pesticides, and medications like steroids. Glutathione is a master antioxidant so is also important in neutralising the reactive oxygen species produced in phase I. Glucuronidation is involved in managing heavy metals, sex hormones, neurotransmitters, plastics, mould, alcohol, smoke, medications including paracetamol, non-steroidal anti-inflammatories, warfarin and immunosuppressants. Important nutrients here include vitamin B3, B6 and iron. Acetylation supports the detoxification of smoke, halides, tyramine, neurotransmitters, histamine, and medications including antibiotics. At this point, we move to Phase III Phase III deals with getting rid of them once and for all. This phase is carried out by the gut, skin, liver, and kidneys. All phases need to be working optimally for effective detoxification. Unfortunately, the domestic cat possesses certain genetic mutations which mean these detoxification pathways aren’t as efficient as they need to be. We first started to learn more about this when we realised that cats have a particular sensitivity to phenolic drugs like acetaminoprophen (paracetamol) and aspirin. It turns out that cats demonstrate an inactivation of the gene responsible for the phenol detoxification enzyme and it is thought that their diet played a role. Findings here Phenols are found in plants and as cats are hyper-carnivorous (they get everything they need from animal tissue), there served no evolutionary reason for them to be able to process these compounds. Cats evolved to detoxify environmental threats, not plants they would never choose to eat, nor human-made syntheticones (medications). The problem is, this enzyme is involved in a larger pathway, which deals with things like steroids, hormones, plastics, mould, heavy metals, and other medications like non-steroidal anti-inflammatories. The bottom line? Cats metabolise these compounds at a much slower rate, meaning they are at risk of a build-up. This is why they appear more sensitive and are in fact at a higher risk of
Hyperthyroidism is commonly accepted as the most common feline endocrine disorder. These are the words found in a Journal of Feline Medicine and Surgery. Here at My Pet Nutritionist, this worries us for two reasons. 1) That hyperthyroidism is such a common disorder 2) That it is accepted Being noted as an epidemic, we think it deserves a little attention. So, let’s explore hyperthyroidism in a little more detail, and what, if anything we can do about it. Until the late 1970’s, there appear few references to hyperthyroidism in the cat. Were there sudden developments in veterinary science, or was something else afoot? What is the thyroid? The thyroid gland is part of the endocrine system. It is a small butterfly shaped gland in the neck. One of the main functions is to produce hormones to regulate the body’s metabolism (the process that turns food into energy). These are more commonly referenced as T3 and T4. Hyperthyroidism is when the thyroid is hyperactive – there is an increased production of thyroid hormones. Symptoms of Hyperthyroidism: Weight loss Increased appetite Increased thirst Increased activity Increased heart rate Poor coat condition Mild/moderate diarrhoea (yet some cats can demonstrate generalised weakness lethargy and loss of appetite) Many cases of hyperthyroidism can be medicated, and so complications are rare, but they can include: Cardiovascular changes High blood pressure Kidney damage (more commonly asa result of treating hyperthyroidism) Diagnosis is usually based on enlargement of the thyroid glands, but this is not always visible. A blood test will confirm levels of thyroid hormones. Treatment is generally with thioamides, which in short act as anti-thyroid medication. They do not cure, simply control, but they must be administered daily. Side effects of this medication can include poor appetite, vomiting and lethargy. Although in some cases, the thyroid gland has been removed. So, what causes hyperthyroidism? So far, there are two main categories of risk factors for hyperthyroidism in the cat. – Nutritional deficiencies – Exposure to thyroid-disrupting compounds There are too genetic risk factors associated with hyperthyroidism, for example Siamese or Persian cats are less likely to suffer with the condition where as domestic shorthaired are the more commonly affected. Findings here Nutritional Deficiencies As claimed in the Journal of Feline Medicine and Surgery, “the feeding of commercially prepared cat food is one leading candidate as a major risk factor for the development of thyroid pathology and hyperthyroidism in cats.” It claims that all epidemiological studies to date have identified feeding an increased proportion of commercially prepared cat food is a risk factor. There are arguments that in the last few decades, the cat food industry has been on a bit of a rollercoaster with iodine. First, they considered high iodine was implicated in hyperthyroidism, so they significantly dropped levels, and since, iodine content has ranged from non-detectable to extremely high, depending on the manufacturer. Iodine is a key element in the synthesis of thyroid hormones. Low iodine results in low thyroid hormone,which spurs the pituitary gland to increase its secretion of thyroid stimulating hormone (we all want to survive after all). Persisting high TSH leads to enlarged thyroid glands. Interestingly, when studied, cats fed a commercially prepared diet who were relatively deficient in iodine, were four times more likely to develop hyperthyroidism than cats supplemented with iodine. Findings here Simple iodine supplementation is not the answer to the question, as is it considered merely a co-factor in a range of causes. Others include, exposure to thyroid-disrupting compounds in the environment, drinking water or diet. Interest in this first appeared with the introduction of fire-retardant chemicals in many household items. The rates of hyperthyroidism seemingly increased with the introduction of these products. Findings here Cats are hyper-carnivorous and have lower activity of certain enzymes involved in both phase I and phase II detoxification pathways. These phases are responsible for breaking down toxic substances in the body (both internally produced and externally exposed). This therefore limits their ability to metabolise toxins. This poor metabolism of xenobiotics is thought to alter the structure and function of the thyroid gland, not only that but there are considerations that it too effects the elimination of T4 hormone, of which leads to high circulating levels. There is evidence which correlates high levels of toxic compounds with feline hyperthyroidism, these compounds are also higher than found in humans that the cats live with (suggesting issues in metabolism). There is a risk associated with commercial food that contain isoflavones and phthalates coming from soy and corn. Both of these compounds are known as endocrine disrupters. These vegetable substrates are detoxified by a particular pathway which is known to be slow in cats. Findings here Being an indoor cat is seen as a risk factor because of the exposure to persistent organic pollutants. Dust is a matrix collecting a range of volatile chemicals released from indoor products like flooring, textiles, furniture, and of course human skin (containing beauty or cleaning products). The heightened exposure is thought to be due to cat grooming behaviour – licking the dust off their coats and ingesting it. Findings here Certain flame-retardant compounds have also been found in commercial cat foods, and data has suggested that the cat liver struggles to metabolise these compounds. These PBDEs (polybrominated diphenyl ethers) contain bromine atoms which mimic iodine and so they may interact with thyroid binding proteins. Cats with hyperthyroidism have also demonstrated higher levels of PFAS which are polyfluoroalkyl substances which are found in products with grease repelling functions, like surface sprays, and floor polishes. Findings here Interestingly, there is a correlation between litter use and hyperthyroidism in cats. Those that use litter boxes more often, are more likely to receive a diagnosis. That along with receiving treatment for ectoparasites. Findings here BPA exposure has also been linked to hyperthyroidism in cats. As we know BPA is found in food, air and soil! Again, cats have a slower pathway in eliminating it. BPA binds to thyroid receptors, competitively displacing hormones. So, what can we do
The prevalence of chronic kidney disease in the cat is seemingly on the up. Generally, what goes up, must come down, but when we look at the factors underlying kidney disease, there is a real concern that this may not happen. Currently, it is suggested that 1 in 3 cats suffer with some form of kidney disease. So, what can we do about it? Let’s take a look at kidney disease in a little more detail, why the kidneys are so important and some of the underlying factors that contribute to the development of it. What is kidney Disease Chronic kidney disease in cats is a prolonged process marked by the irreversible loss of kidney function. It is suggested that the early stages of CKD are often missed in cats, likely because many are outdoor cats so urination and drinking behaviours may not be as easily noted, along with vomiting etc. Kidney disease is generally associated with ageing pets; like all things, kidneys too get tired as they get older. But there are new concerns, well, new in 2014, that younger cats are seemingly presenting with the disease too. Where 30-50% of cats 15 years of age or older suffer with CKD, 13% of those under the age of 4 also suffer. Symptoms of Kidney Disease in the Cat: Increased thirst Increased urination Reduced appetite Weight loss Vomiting Fatigue Weakness Bad breath There are 4 stages of kidney disease in the cat, they are based on serum creatinine concentration: stage 1 through 4, with 2 being mild, 3 being moderate and 4 being severe. Findings here Why are the kidneys so important? The two bean shaped organs have vital functions in the body. They monitor fluid levels in the body, control and process waste and release vitamins, minerals and hormones. Their main function is to collect waste products and turn them into urine. Blood enters the kidney though arteries and splits into nephrons. The nephron splits into two nifty mechanisms to filter the blood. This includes the glomerulus and tubule. The glomerulus is like a sieve, allowing certain compounds from the blood into the tubule. The tubule then senses whether any of these compounds are needed around the body. If so, they are absorbed into the body. The tubule also senses waste products, like urea which is produced during the break down of protein. It redirects urea as urine which travels down the ureter, into the bladder to be excreted. The kidneys also activate vitamin D, and release hormones such as erythropoietin which is needed to produce red blood cells and renin which regulates blood pressure. Without the kidneys, the body would be full of blood that hadn’t been sieved and full of harmful waste. It also wouldn’t be receiving the vitamins and minerals, which, without being dramatic, are in fact critical to life. Causes of Kidney Disease There are genetic predispositions to developing kidney disease; certain breeds that are more likely to suffer with kidney issues include the Persian, Siamese, Ragdoll, Russian Blue and MaineCoon. But other than acute renal failure caused by poisoning (plants, pesticides etc), there are other factors that can contribute to kidney issues. As we have established, one of the kidney’s main role is to filter helpful and harmful compounds in the blood. It stands to reason that the more harmful compounds it must process, the sooner it reaches its retirement party! It is often suggested that chemical exposure isa progression factor in the disease and sadly cats are regularly exposed to cleaning agents, pesticides, and many more environmental toxins. These can be ingested, inhaled, or exposed transdermally (through the skin). The foods fed to cats can also impair kidney function. Mycotoxins are a diverse group of chemicals produced by a diverse group of fungi. However, mycotoxins, can be nephrotoxic (toxic to the kidneys). Studies have demonstrated that anywhere between 62% to 100% of cat foods sampled had mycotoxin contamination. Findings here There are also reports of melamine toxicity in cats, resulting in kidney damage. You guessed it; the source of melamine was contaminated food. Findings here Mild dehydration is also a risk factor for kidney disease. This is a concern because of the moisture content in many commercial foods. Dry-based cereal foods rank low on moisture,with dogs demonstrating increased drinking to counterbalance their water requirement. Cats, however, have an evolutionary low thirst-drive. Cats are obligative carnivores, meaning they get what they need from animal tissue. Therefore, they would naturally get moisture from their whole prey kills. But they are no longer getting the same level of moisture with a dry based diet and their thirst-drive hasn’t yet caught up (in evolutionary terms)! Starch also poses a risk for developing periodontal disease. Wait, what has periodontal disease got to do with the kidneys? And what has starch got to do with cats? Stick with us. Starch is the storage form of energy in plants; and then becomes a source of sugar in an animal’s diet. Bacteria found in the mouth feed off these starches and form a biofilm called plaque. This slowly degrades the tooth and surrounding structures. Not only that but the frequency of eating can contribute to the development of periodontal disease. Saliva can perform a clean-up between meals, but this becomes less of an option for the cat who is free fed throughout the day. The long and the short of it, many dry-based foods contain starch, which is a risk for periodontal disease. Periodontal disease is regularly implicated as a risk factor for kidney disease due to the relocation of oral bacteria throughout the body. Despite this, there are also things that can help mitigate the risks associated with kidney disease. Water intake is of utmost importance in all kidney patients. Therefore, a high moisture diet is essential. When offering drinking water, ensure it is filtered to remove any potential harmful compounds before they even get into the body. Protein restriction in kidney cases is much discussed and often controversial. Surely
Cats are obligate carnivores. What this essentially means is that cats rely on nutrients in animal tissues to meet their specific requirements. Not plants…. but animal tissues. So, let’s explore the world of the cat in a little more detail and see how we can support their nutritional needs to not only survive, but thrive. Evolutionary events have led to a unique digestive and metabolic peculiarity. Whilst in many other species, we have the three macronutrients, fat, protein and carbohydrates, cats seem to have no physiological requirements for carbohydrates. Now where this becomes interesting is that the brain and red blood cells have an absolute need for glucose, and we know that carbs equal glucose, so where do cats get glucose from? Surely without carbohydrates they would be forever hypoglycaemic? Well, through a process of gluconeogenesis, they produce glucose. Us humans, and dogs too can perform this process, but cats have it down to a fine art. Gluconeogenesis is the metabolic process by which glucose is produced from non-carbohydrate precursors, like lactate and amino acids (and we know that amino acids are the building blocks of protein). All amino acids, except leucine and lysine are gluconeogenic and alanine is the major gluconeogenic amino acid. The process mainly occurs in the liver, but some processes are carried out in the kidneys and a small portion is carried out in the intestines. It is thought that cats evolved with the process because of their proportionally large brain. As we have mentioned, the brain has an absolute need for glucose, and it is thought that the brain demand for glucose in cats is around 30% whereas for us humans who have a much larger brain is 44%. Cats wouldn’t have been able to consume high enough levels of carbohydrates from their natural prey diet, so their body had to adapt to survive. This evolution has resulted in a small capacity for starch digestion, having limited salivary amylase which is similar to dogs. Amylase is found in the feline pancreas and chyme, but the activity is incredibly low compared to other animals. Their pancreatic maltase activity is also extremely low. Cats seem to know this and when given the opportunity will choose low carbohydrate but high protein diets in order to balance their own macronutrients. They also don’t appear to have developed a sweet tooth. In evolutionary terms, us humans would have stocked up on sweet-tasting foods, but cats didn’t need to. To that end, they don’t show any preference for natural sugars or artificial sweeteners. In the absence of protein, cats will opt for fat. When fat and protein is limited, but carbohydrate is unlimited, cats appear to experience nutritional deficits. This is largely due to their requirement for taurine. Taurine is present in a range of meats and seafoods but is essentially absent from plant material. This is another reason why cats are deemed obligate carnivores. Dietary deficiency of taurine is linked with a range of important conditions. Retinal Degeneration More commonly known as retinal atrophy, it is the complete or partial wasting of the retina. The cells degenerate over time, eventually leading to blindness in the cat. First signs include the eye being more reflective and the pupils are more dilated than normal. Lesions are usually bilaterally symmetrical. A dietary deficiency must be present for several months before changes appear but lesions are progressive whilst the cat is on a deficient diet, although visual defects don’t tend to appear until the late stages of degeneration. Reproduction Taurine deficiency is well known for having marked effects on reproductive performance and on the growth and survival of the young. Cerebellar dysfunction often occurs in kittens of taurine deficient mothers. Dilated Cardiomyopathy Taurine deficiency can lead to weakening of the muscle cells in the heart, causing a condition called dilated cardiomyopathy (DCM). Taurine is essential in membrane stabilisation. Many cases of feline dilated cardiomyopathy are associated with low plasma taurine levels and when administered with taurine, they show an improvement. Sadly, when left untreated for too long, dilated cardiomyopathy will progress to heart failure and death. The importance of taurine in commercial cat food was noted in the late 1980’s; following reformulation of cat foods, cases of taurine related dilated cardiomyopathy decreased from 28% to just 6%. Findings here Including taurine, eleven amino acids are recognised as essential for the cat, but some have a higher utilisation than others. Taurine is necessary for vision and the function of the cardiac muscle, nervous system, immune system, and reproductive systems. Arginine is used in the urea cycle and methionine and cysteine are incorporated into antioxidants, hair and urinary outputs but are primarily gluconeogenic amino acids, catabolised to provide energy. With their incredible utilisation of amino acids, cats present what is known as a carnivore connection. This is a bundle of carbohydrate-sensitive conditions, first noted in humans who were late to join the carbohydrate-eating party (Paleo-Indians, Australian Aborigines for example). In short, there is a higher incidence of conditions like glucose intolerance, insulin resistance and diabetes. However, other data has suggested that carbohydrate content is of little effect, and these conditions are instead associated with overweight or obese cats. 44% of cats in the UK are deemed as overweight or obese by veterinary professionals. Whereas when surveyed, only 8% of owners think their cat needs to lose any weight. Obesity is defined as abnormal or excessive fat accumulation that presents a risk to health. This is a result of excess calories that the body cannot use; these calories can be from any of the macronutrients. It is often considered that a major factor driving obesity is the practice of free-feeding, in which a bowl of dry food is available for consumption by a cat throughout the day, and simply topped up as it runs out. There is also recent research that suggests feeding cats just once a day may control hunger better than several feeds a day. Findings here This study demonstrated that the cats showed a faster
