Here at My Pet Nutritionist, we know that a healthy gut microbiome is the most important aspect to keeping your dog healthy all round! There is so much to learn about the gut microbiome – what it really is, what it consists of, what other parts of the body it interacts with, and what happens when it’s not in tip top condition. Many of our readers will notice that most of our blogs mention the microbiome, so this blog post is a full round up of everything gut microbiome related, in one easy read! What is the Gut Microbiome? Every dog has a gut microbiome. It’s one of the most important parts of your dog in terms of digestion and overall health, from joints to skin, to the brain and immunity. The microbiome is a community of microbes, including good and bad bacteria, viruses, and fungi. The gut microbiome is very carefully balanced. Some of the microbes found in a healthy gut microbiome are ones we would typically class as ‘bad’ which have health conditions associated with them, including bad bacteria such as Salmonella, and Clostridia. Viruses and Fungi are typically classed as ‘bad’ microbes too, but are still part of a healthy microbiome. Good bacteria such as Lactobacillus, Bifidobacterium and Enterococcus are all found in abundance in the healthy canine gut microbiome – these beneficial bacteria are found in high enough numbers to outweigh the negative impact of the bad microbes found in the gut. A healthy gut microbiome means the ‘good guys’ outweigh the ‘bad guys’. Health problems begin to emerge when the gut microbiome is knocked out of balance, allowing for gut dysbiosis to occur. Gut dysbiosis can lead to a host of health problems including reduced skin and joint health, increased digestive issues, and prominent or mild negative behavioural changes. Findings Here Findings Here Interactions Between the Gut Microbiome and the Rest of the Body The health of the gut microbiome is a huge part of overall health – but why is this? You may be wondering how gut health could impact so many other parts of the body, so let’s take a closer look at these! We can look at the gut as a ‘roundabout’. Roundabouts have multiple exits – these ‘exits’ stemming from the gut are collectively called Axes; and these link to other parts of the body to form a two-way pathway/link from the gut. The main axes are: The Gut-Skin Axis: this pathway connects the gut to the skin, and the skin to the gut. If we start at the gut and work our way to the skin, we can see that poor gut health can cause or exacerbate skin conditions. Going to other way; from skin to gut, we unfortunately have the risk of gut microbiome damage caused by external exposure to toxins, whether they’re from laundry detergents, household cleaning products, external flea and tick medications, or other environmental toxins. The Gut-Joint Axis: this pathway connects the gut to the musculoskeletal system, and the musculoskeletal system to the gut. An imbalance in the gut microbiome can be connected to poor joint health, especially in cases of osteoarthritis due to the increase in inflammation around the joints. In a poorly balanced gut, there is often an increased risk of pro-inflammatory cytokines and inflammatory metabolites being produced, which are the main cause of poor joint health in dogs. The Gut-Brain Axis: this is the bidirectional pathway between the brain and the gut. This pathway has connections both physically, and chemically. In terms of physical connections, the Vagus Nerve is the main avenue for carrying signals between the two locations. Chemically, the healthy gut produces neurotransmitters and hormones, which move between the brain and gut. Mood, response to stress, and digestion are three of the main roles of the gut-brain axis. It is also important to note that around 70-80% of the immune system is found in the gut! Keeping the gut microbiome healthy, and perfectly balanced means the immune system, and therefore overall health of an individual remains stable. Findings Here Findings Here Findings Here Findings Here What Happens When the Gut Microbiome is Unhealthy? When the Gut Microbiome is unhealthy, a host of health conditions can occur. As previously mentioned, an unhealthy gut microbiome is unbalanced; and this condition is called Gut Dysbiosis. Gut Dysbiosis occurs when the ‘bad microbes’ outweigh the ‘good microbes’. Here’s some health concerns that we see a lot in those with an unhealthy gut microbiome: Food sensitivities: when the gut microbiome is unbalanced, food sensitivities are common due to increased gut permeability; known as Leaky Gut. When the gut integrity is poor, food particles leak into the bloodstream which encourages the body to create an immune response, presenting as food sensitivities. Yeast: yeast cells are naturally present in the gut; they’re called Candida. When Candida is present, and there’s not enough of the good microbes to keep these in check, a yeast infection will often occur. Symptoms include rust coloured paws, ears and groin, cheesy smelling feet, and itching among others. Digestive problems: digestive upset including diarrhoea and vomiting is common in those with an unhealthy gut microbiome, due to the abundance of ‘bad’ microbes and a lack of ‘good’ ones to keep the effects of the bad ones at bay. Many dogs also suffer with Small Intestine Bacterial Overgrowth (SIBO) which contributes to these symptoms. Bad breath: a lot of owners assume their dog’s bad breath is caused by poor dental hygiene, however this is often not the case. Bad breath can emanate from the gut, in those with poor gut health. When the gut microbiome is unbalanced, the overgrowth of harmful bacteria in the gut results in the production of VSCs; Volatile Sulphur Compounds, which cause bad breath. Inflammatory Bowel Disease (IBD): when the gut microbiome is unbalanced, inflammation occurs as a result. This inflammation often leads to chronic inflammatory conditions such as IBD. Other gastrointestinal conditions occur due to this too, however IBD
Paw biting is probably one of the most common symptoms we see among our clients at My Pet Nutritionist. It’s daunting when your dog just wont stop! The noise of paw chewing, every owner of a paw biter knows… it can be draining! Our handy guide may help you understand why your dog is biting his paws, and what you could do to help alleviate it. Exposure to chemicals Exposure to chemicals in various aspects of life, can have a massive effect on your dog’s health – especially gut health, which can lead to symptoms such as itchy paws and undercarriage. Let’s discuss the effects flea and worm treatments, household cleaners, and environmental products can have on itchy paws! Flea and Worm Treatments Flea and worm treatments may seem rather an odd cause of paw biting, as flea and worm treatments are administered either orally, or on the skin. These products are so very damaging to the body, both internally, and externally. Not only can they cause chemical burns, and sore skin, as well as neurological problems, they can also damage the gut. A damaged gut can cause a histamine response in the body, which brings with it, symptoms such as excessive itching and licking, including paw biting. We would recommend switching to natural alternatives for flea and worm prevention. Household Cleaning Products It’s important to be mindful of the ingredients used in household cleaning and laundry products. An enormous amount of the ingredients in many laundry products and cleaning products are skin irritants. Try to use as natural products as possible – some natural pet companies stock natural laundry and cleaning products, probiotic laundry and cleaning products, or you can make your own! But my cleaning product states ‘pet friendly’?! Unfortunately, this simply means that it wont kill your pet. Great, but skin irritations are still very prevalent! Dogs make nearly constant contact between their feet, and the floor or soft furnishings, meaning they are more at risk of contact allergies on the feet, causing biting. Environmental Products Navigating around environmental toxins can be extremely tricky. The vast majority of councils in the UK tend to spray weed killer on the streets. These are just one of the environmental products which can contribute to paw biting. Others include patio cleaners, professional astroturf cleaners, grit/antifreeze, and many others. Washing paws after walks is a great idea to help reduce the risk of these toxins affecting the comfort of the dog’s paws. Yeast Yeast tends to have a very familiar symptom, along with the paw biting; a rusty colour on and around the toes. Yeast has two pathways – from the gut, and purely on the skin. Most yeast we see is down to an unhealthy gut, which allows for the overgrowth of candida, however, less commonly dogs may get Malassezia; which is a yeast infection on the skin. Candida Candida is a fungus which occurs naturally on the skin, and in the gut. When it is present in the correct amount, it’s a healthy part of a well-functioning microbiome. The issue comes when candida out competes good bacteria – this leads to a yeast infection. This predominantly occurs in the small intestine, and is aptly named Small Intestine Fungal Infection (SIFO). Overgrowths of candida can be down to exposure to the aforementioned toxins, poor gut health (and therefore a weakened immune system), allergies and intolerances, and antibiotics. As antibiotics not only attack bad bacteria, they also attack the good bacteria, which allows for the growth of fungi such as candida. As yeast thrives on sugar, its important to cut out any high carb, starchy, and sugary foods. Dry food can contain anywhere between 30 and 70% carbohydrates! This means that feeding a balanced fresh food would be the best option. It is also very important to keep on top of, or get to the bottom of allergies and intolerances; running an elimination diet, and healing the gut with mucilage herbs and probiotics is usually the winning combo when getting to the bottom of intolerances. Vaccines, some types of fish such as tuna, and even tap water are contaminated with heavy metals – yeast also thrives on heavy metal exposure, so it’s also important to not use such products, and use filtered water. Working on gut health is very important – you may find our Gut Guardian supplement useful! Findings Here Findings Here Malassezia Folliculitis Affecting only the skin, Malassezia Folliculitis is the skin-specific species of yeast fungus. Often called Fungal Acne, Malassezia causes acne-like pimples on the skin due to the yeast infecting hair follicles. Malassezia can be harder to treat than candida, but thankfully, rarely affects the paws. Findings Here Findings Here You can fund out more about yeast in our blog here! Allergies and Intolerances Unbeknownst to many, allergies and intolerances are very different from one another, and intolerances are often mistaken for allergies. Intolerances are the digestive inability to break down certain foods, specifically proteins. The inability to digest proteins properly, causes intolerances to develop. They can be worked on and improved through gut-work using mucilage herbs, and probiotics such as our Gut Guardian supplement. Allergies are much more severe, and are down to immune modulation – true allergies cannot really be improved. In some cases, allergies are life threatening. An interesting fact, is that in food reactivity cases, on average 10% are true allergies, whereas 90% are intolerances. Food Food allergies and intolerances can affect paw biting, due to poor gut integrity which causes a histamine response by the body. When the body reacts to a sudden influx of histamine, one of the most common symptoms is itching. Irritation can, and often does happen all over the body. Red sores, constant scratching, restlessness, and frustrated panting can all show your dog is itchy. Paw biting is one of these common symptoms too – this shows the dog’s paws are itching, as part of the immune response to foreign particles in the bloodstream. Contact Contact allergies
Remember, remember the 5th of November. It’s the 5th of November tomorrow although only celebrated in the U.K. Here at My Pet Nutritionist, this isn’t something we celebrate, well certainly not with fireworks. Of course fireworks aren’t a one-day celebration. We observe many holidays, in different countries throughout the year with fireworks. Sadly, this can be a difficult time for pet parents and their beloved dogs. We would also like to mention cats and other wildlife that are affected by the trauma and injury of fireworks. We decided to compile a top 10 tips, aimed more at your dog, to try and manage some of the stress that may be endured, during these times. Sound Desensitisation Probably too late for the impending f November but for future , playing a fireworks sound effect (many are available free online) at a very low level fora brief period of time can be incredibly help to build a tolerance and desensitisation to loud fireworks. Whilst playing these sounds, we suggest giving your dog a series of small, tasty dog treats and praising them when they remain calm. Then turn the sound off and stop giving treats. Repeat the process with the sound at a low level until your dog looks to you for reassurance. Always be sure to check that your dog is comfortable and not displaying signs of anxiety. Keeping the volume low to begin with is key. Gradually turn up the sound in subsequent training sessions, varying the recordings to include a variety of firework types, until your dog begins to associate the noises with goodies and praise for having a calm demeanour. Schedule a Pre-Fireworks Walk Going for a long walk or spending time playing during the day may help stimulate your dog enough before the fireworks begin. A dog that’s mentally and physically tired might be more likely to sleep. We don’t however advocate exercising your dog into the ground as this can raise cortisol levels (the stress hormone) and may actually heighten anxiety symptoms. Schedule Dinner and Toilet Time Earlier It’s important to time your dog’s meal times and toilet trips well in advance of the night getting dark. Since fireworks typically start early evening, it is good to try avoid going out whilst the fireworks are going off. Give your dog enough time to finish dinner, digest and go to the toilet before the noise begins so that he’s not forced to hold it during an already stressful time. Keep Your Dog Occupied During Fireworks If your dog isn’t too distressed to concentrate, it is good to create some distractions by giving your dog something delicious to focus on like a chew, bone (if they are used to bones),or the use of a kong filled with treats they love. Snuffle mats or search and find games can be helpful or if you dog is used to training; you can maybe create a fun activity. Drown Out the Noise The sound of fireworks will seem like unpredictable booming sounds to your dog. This can be perceived as an impending danger and make a dog feel incredibly vulnerable. While desensitising with a fireworks recording throughout the year will help your dog learn to cope with the noise, an easy way to manage fireworks anxiety during the event, is to try and drown out some of the sound with something more calming to the nervous system. We recommend playing classical music or using a recording specifically for dogs. We recommend ‘through a Dog’s Ear recording’ . Obviously belting out music may be a little alarming but find a volume loud enough to camouflage the sound of the fireworks. Reassure Your Dog You may have heard that comforting your dog in times of stress can reinforce fears. However, unless your dog wishes to be on their own, your dog may benefit from some reassurance and contact, after all a reaction to fireworks is a legitimate fear. Providing comfort during this time may be appropriate and helpful. Read your dog and don’t enforce anything they don’t want to do. Create a Safe Space Shut all blinds and curtains. Sitting in a closed, small room together, with soothing music, allowing your dog to sit or lie where he wants may work out for you. Petting or snuggling with your dog is completely acceptable if they are searching for reassurance. If your dog’s safe place is in his crate or in a small nook in the corner of your home somewhere, you can create a den or cover all sides with a blanket allowing a clear exit at all times. Try ‘Thundershirt’ Very much like swaddling a baby, a snug garment that encases and gently puts pressure on your dog’s torso, touching key acupressure trigger points, can reduce anxiety for stressful events. Get your dog used to wearing an anxiety vest, preferably a few weeks before firework season, allows your dog to become comfortable and acquainted with the garment beforehand. The Thundershirt is designed to help reduce stress in your dog and we have seen some good response to its use. Try Nutrients for Anxiety Chamomile, valerian, skullcap and lemon balm, the amino acid theanine, many vitamin B’s and magnesium are probably the main nutrients to help support anxiety. Foods rich in B vitamins, magnesium, zinc and other herbs may help greatly as well as considering supplements to aid anxiety or herbal teas given as a treat. Find out more here. Calm Complex Consult with a Professional If your dog’s anxiety doesn’t improve, find a positive behaviourist to help you and your dog work through some protocols to help with relaxation during these times. If your dog’s fireworks anxiety puts them in an inconsolable state, talk with a nutritionist or holistic veterinarian. Anxiety supplements (see above) for dogs may be helpful or if your dog poses a danger to themselves or you, medication may need to be discussed with your veterinarian. In conclusion safeguarding against the least stressful event during fireworks season is a multi-step approach. It
We often see the phrase “let food be thy medicine” bandied around, and for all intents and purposes it is accurate. We see that both health and disease are nutritionally responsive. What we mean here is that the food we eat, and feed our pets can influence their health and/or disease states. Where most think this ends with physical health, what we are seeing more and more is that food can also influence emotional states. So, can food support your anxious dog? You bet it can! So let’s take a look. Smashing Fish! Omega-3’s, in particular DHA, play critical neuroprotective and anti-inflammatory roles in the brain. Supplementation of omega-3 has been seen to: – Improve cognitive function Findings here – Reduce anxious symptoms Findings here – Reduce aggressive behaviours Findings here – Reduced stress-related hormone production Findings here Did you know? Omega-3 levels are regularly noted as being low in aggressive dogs. This isn’t indicating causation, simply an observation worth noting. We find these super-omegas in fish! Think SMASH – sardines, mackerel, anchovies, salmon and herring! Calming Chamomile Chamomile (Matricaria recutita) is one of the most widely used herbal remedies in the world. While there are many varieties of chamomile, Roman (A. nobilis) and German (M. recutita) are the most widely used forms. These are members of the Compositae (Asteracae) family. German chamomile is considered the more potent and is most widely used. It has many medicinal uses including carminative (anti-colic), antiseptic, and anxiolytic. Did you know? Chamomile is notorious for its continuous bloom! Chamomile serves as a safe, general-purpose calming herb that doesn’t taste too shabby either. In human tests it has been effective in mild to moderate generalized anxiety disorder. Findings Here It can be served as a tea, but is also available as an oil infusion, tincture, salve and ointment. Magnificent Magnesium Can we even talk about anxiety without mentioning this super-important mineral? Often noted as the ultimate chill pill, magnesium is an essential nutrient that many are deficient in. Its low levels are regularly established in cases of depression in humans, so it is clear it plays a role in mood modulation and the stress response. Magnesium affects several neurotransmitter systems. Firstly, it inhibits excitatory neurotransmitters. Excessive excitation can lead to the death of brain cells, which affects the overall structure and functioning of the brain. Magnesium also acts as a cofactor in the serotoninergic system. As we know serotonin is that happy chemical, and low levels of magnesium are regularly linked to low serotonin levels. Did you know? Magnesium excretion is increased during times of stress. Catecholamines and corticosteroids enhance the shift of magnesium from inside the cell to outside of the cell leading to increased urinary excretion. In turn, low magnesium levels increase the release of stress-associated hormones. This unfortunately creates a cycle of a reduced resistance to stress. So, if you have a stressed pet, you may want to take a look at how you can increase their magnesium intake. Magnesium is found in leafy greens, nuts, and seeds. The ones packing the highest punch are spinach and pumpkin seeds. No wonder Popeye always looked so happy! Brilliant B-Vitamins Many of the B-Vitamins are involved in functions which directly impact the brain and nervous system. To single them out specifically, B12 and folate are reportedly low in cases of mood disorders in humans. Did you know? B-vitamins can become depleted during times of stress, the more the body requires them for tasks, the more they need replenishing. Stress also affects the lining in the stomach and compromises its function. Intrinsic factor is essential in B12 absorption but lack of production due to compromised function can significantly affect B12 levels. B-Vitamins can be found in eggs, liver, kidneys, chicken, red meat, tuna, mackerel, salmon, shellfish and dark green vegetables like spinach and kale. There’s a reason you were always told to eat your greens! Healing Herbs Skullcap and Valerian are some more of our trusted herbs to support the anxious pet. Many will recognise valerian for its similar smell to old, dirty socks! Valerian (Valeriana officinalis) is commonly used for the treatment of insomnia and anxiety disorders in humans. It has a mechanism of action similar to benzodiazepines. Valerian has been shown to decrease the removal or metabolism of GABA, thereby allowing GABA to stay around longer and do its thing, and as we know, GABA is the brake-like neurotransmitter in the body. Findings Here Valerian is available in tincture, tea and fresh or dried root. Skullcap has a similar mechanism of action to Valerian in that it is thought to be GABAergic. But it is also thought to have an effect on serotonin receptors, which is why it has reported sedative and relaxing effects. A small, placebo-controlled, double-blind, crossover study of 43 human participants demonstrated that skullcap reduced symptoms of anxiety and depression in some individuals without causing an observable reduction in energy or cognition. In both cats and dogs, skullcap has been effective in general nervousness and excitability and in any condition where there is oversensitivity in the nervous system. Skullcap is usually found in dried herb or tincture form. Food is certainly a tool in your box when supporting your pet’s well-being, if you would like any guidance then please check out our services to see how we can help. Thanks for reading, MPN Team
We know that there is a clear physiological response to stress, but if this response is the same from body to body, and therefore human to human, why do some of us seem more stressed than others? Our perception of stress can be influenced by environmental, psychological, and genetic factors which all affect our stress load. Most of us are familiar with the phrase “the straw that broke the camel’s back,” or more technically termed, trigger stacking, so let’s take a look at stress load for the pet owner and considerations to make in reducing it. Stress Load There is this concept of allostasis and it is the process of maintaining stability in response to demands – it’s similar in sound to homeostasis, which as we know is the body functioning as it should. Allostatic load is therefore the cumulative burden of stressors; think of it like overload – it is when challenge exceeds the ability to cope. This is generally where the problem lies for many of us. If we are faced with one stress at a time, we manage it, once we miss our alarm, smash a coffee cup, run out of milk, lose the car keys and then get our jumper stuck on the door handle; we get particularly annoyed at the door handle for being there. If we had simply ran out of milk that morning, we would have just made a note to call for some on the way home. But this concept can also happen on a much bigger scale; when we are facing difficult relationships with friends or family, if we are managing a chronic illness of a family member whether this is human or animal, if we are worried about finances or dealing with the loss of a loved one (human or animal). Whilst it’s impossible to “size” stressors, these chronic situations are always lingering in the background – they are always weighing down that one side of the seesaw; making it harder to balance it out on the other side. We already, consistently, have a stress load. Stress as a Contagion Stress is also contagious. This isn’t something we need to notify the World Health Organisation about, but it’s true. It is deemed as co-regulation as species. In an evolutionary sense, it improved survival. If someone in our tribe became aware of a threat, the more sensitive we were to that meant that we too, could act quickly and avoid or manage it. The issue is that we are social beings, and whilst we’re no longer faced with an intruding predator or tribe, we still mirror others. For the most part, this is often described as being an empath – and we’ve all met (or are) those who seemingly take on the stress of others – but it will all add to our load. This also occurs with our pets. We mirror our pet’s stress, just like they mirror ours. Many studies have shown that when tested, pet’s have increased cortisol levels alongside their humans. On the subject of evolution, we also have our genes to thank for how well we manage stress. Inherited Stress Epigenetics is the area of study that looks at, despite DNA remaining constant, how certain exposure can alter gene expression. DNA is like a PDF document and gene expression is like the PDF writer. What the document editor does is largely dependent on their working conditions like environment, nutrition, lifestyle and more. What’s particularly interesting is that in cases of post-traumatic-stress-disorder or PTSD, these individuals could pass on epigenetic changes to their off-spring. In short, trauma could be inherited. This may not be a surprise if you have ever come across a pet who was seemingly raised in the perfect home, but is still a nervous wreck! Could their trauma be inherited after all? This isn’t a cop out – but it’s useful information when understanding our own feelings and behaviour. Stress Genes We have also identified certain genes that can help us understand our response to stress. We know that certain hormones and chemicals are released in the body in response to a trigger; they do their job and then what? Well, they need to be broken down and removed. But the right parts of the body need to get the right instructions for this to occur. The body is relying on that PDF document again. The COMT gene, or more technically known as catechol-O-methyltransferase gene, codes for the enzymes to break down neurotransmitters like dopamine, epinephrine and norepinephrine (that occur in the stress response), and like everything in life, this can be coded slow, fast or just right! The slow variation is more associated with HPA axis dysfunction – meaning you are more sensitive to stress. The catecholamines linger, meaning they have longer to do their thing. If you have a fast variation, you are less stress sensitive, because they are broken down quickly and excreted, but equally, as dopamine is involved in memory and attention, you can have a shorter attention span. There are positive and negatives for both variations – the slow variation may make you more stress sensitive, but you’ll likely have better attentional control. What’s also super interesting is that this genetic coding occurs in our dogs too – so we can have more stress-sensitive dogs, or less stress-sensitive dogs. And whilst we can’t change the gene, we can change how it is expressed – so even if we have fast/slow metabolism of our stress catecholamines, we can make lifestyle choices to support this. As it’s a methylation gene, adequate B-vitamins in the diet are essential, along with appropriate levels of magnesium. A diet rich in leafy greens is one of our favourite tips to support stress responses. In the case of a slow COMT, excess oestrogen can further burden it – so it can be useful to limit oestrogen boosters like xenoestrogens (plastics, pesticides, and chemical compounds), dairy, parabens and often soy. Exercise also requires methylation and increases
Whether it’s a trail of slobber across your face or you’re sitting in wonder at your dog licking the slate around the fireplace, dogs like to lick. Everything. We find it endearing and a sign of affection when we get a tongue to the ear, or we just assume they’re practicing good hygiene when they are licking their paws. More often than not, only your dog knows why they are licking that rock in the garden. But there are occasions when there is more to licking behaviour. Let’s delve into the world of allergies, stress, pain and just good old-fashioned grooming. Why do dogs lick their paws? If you made a tally of a day in the life of your dog, licking paws would come in pretty high. More often than not, dogs will lick their paws to groom themselves. So, if they’ve come in from their walk or even just from a mooch around the garden, you’ll find them preening themselves and even having a little nibble. This is generally expected behaviour. However, this can become excessive if your dog is irritated by something they walk through or on. Grasses, pollens and toxic chemicals can all cause irritation to their sensitive paws. You also run the risk of salt or antifreeze exposure during extreme weather. Not only does this irritate them externally, but through grooming, they ingest it and can cause subsequent damage internally. It’s always best to rinse your dog’s paws when returning from a walk and give them a towel dry. In extreme climates you can even apply an all-natural paw balm or simply some coconut oil. Dogs will also lick parts of their body that are painful or stiff; so, if your dog has strained or sprained their leg, they may start licking their paw of the affected leg. Long nails can cause pain too, so check your dog thoroughly if the licking is a new behaviour. Dogs In Pain Excessive licking is usually identified by a reddening of the hair on the area being licked, so it’s pretty easy to notice. This is thanks to a protein found in the saliva which stains the hair. It’s not blood, don’t worry. However, excessive licking can cause trauma to the hair and skin, leaving inflamed, red and sore patches. This is why the underlying issue needs to be tackled as soon as possible. Why do dogs lick people? Some dogs lick people, some dogs don’t. How they have been raised plays a huge part in this. Quite often, if a dog has been allowed to lick their owner, they may lick other humans. If, however, an owner doesn’t want this behaviour, then they will ignore it. The dog won’t get a response and often will cease to do it. Those of us crazy dog owners who couldn’t care less whose canine slobber we get covered in, usually become jovial, we smile or laugh. The dog, even in the absence of a “food” reward, is receiving positive reinforcement. Dogs can read human emotion and, maybe, if they think we like being licked, they figure it’s just something they should keep doing. Why do dogs lick faces? It’s impossible to know for certain why dogs like our faces, but we think it comes from their puppyhood. If you notice how Mum Dogs behave with their puppies, they spend a huge time licking them, grooming them. The great thing is, the more a Mum Dog does this, the more resilient her puppy is as they grow. They are also less reactive to stress. It is believed that this behaviour reduces the amount of stress hormones in the puppy’s body. So, we could argue that our dog licks our face because they are imitating the behaviour they experienced. We could also argue that our dogs do it to help soothe us (do they do it more if we are stressed?) The less endearing explanation is that actually, as a dog’s sense of smell is so great, they’ve sniffed out a crumb or remnant of food/drink around our mouths and actually just want a taste. Why do dogs lick your feet? Most will agree, feet are the smelliest part of the human body. In terms of biology, this is pretty accurate. Human feet have more sweat glands per inch than anywhere else on the body. Wearing tight fitting socks and shoes also keeps moisture and heat in, providing a great environment for bacteria to multiply. Dogs have a great sense of smell, so when there could potentially be a great mixture of water, ammonia, potassium, nicotinic acid, magnesium, chloride, sodium, creatinine, uric acid, ascorbic acid, thiamine and riboflavin (also known as sweat) and then a whole host of different bacteria, why wouldn’t your dog have a lick and see what they could find? Dog’s explore their world through smell and sight. Maybe they’re just drawn to the smelliest part of the human body? (we’re not saying you have smelly feet, they can just find more information there). Why do dogs lick the air? Whilst dogs do explore their world through smell, and smell contributes massively to taste experience, it’s unlikely that when your dog is licking the air, they are trying to “taste” the air. They are more likely, stressed. Licking is a stress behaviour for canines. Notice when your dog is licking the air; what is happening in their environment. Is someone touching them? Has someone new come into the home? Are you near their food? Is someone near their toy? Are kids nearby? Have you made a fuss and touched a certain part of their body? This could indicate pain. It’s important to notice the trigger and also watch for other stress behaviours like; drooling, panting, yawning, pacing, head flicking or turning away from the stressor/trigger. Find the trigger and remove it. Licking is a warning signal; ignorance often leads to escalation. Why do dogs lick their nose? Like we mentioned above, this is most likely a sign of
Sadly anxiety is as common in dogs as it is in humans. Anxiety is one of the body’s normal responses to stress; the problem is that our stress response hasn’t evolved with modern life and both us and our dogs can often feel overwhelmed. Alongside behavioural support for our anxious dog, we can look to support their stress response system from a nutritional standpoint. Let’s take a look at 5 of our top nutrients to support anxious dogs. 1. Omega 3 Fatty Acids Omega-3’s, in particular DHA, play critical neuroprotective and anti-inflammatory roles in the brain. Supplementation of omega-3 has been seen to: – Improve cognitive function Findings here – Reduce anxious symptoms Findings here – Reduce aggressive behaviours Findings here – Reduced stress-related hormone production Findings here What’s also super interesting is that omega-3 levels are regularly noted as being low in aggressive dogs. This isn’t indicating causation, simply an observation worth noting. Great sources of omega-3 fatty acids: Mackerel Salmon Sardines 2. Magnesium Often noted as the ultimate chill pill, magnesium is an essential nutrient that many are deficient in. Its low levels are regularly established in cases of depression in humans, so it is clear it plays a role in mood modulation and the stress response. Magnesium affects a number of neurotransmitter systems. Firstly, it inhibits excitatory neurotransmitters. Excessive excitation can lead to the death of brain cells, which affects the overall structure and functioning of the brain. Magnesium also acts as a cofactor in the serotonergic system. As we know serotonin is the happy chemical, and low levels of magnesium are regularly linked to low serotonin levels. Not only that, but magnesium excretion is increased during times of stress. Catecholamines and corticosteroids enhance the shift of magnesium from inside the cell to outside of the cell leading to increased urinary excretion. In turn, low magnesium levels increase the release of stress-associated hormones. This unfortunately creates a cycle of a reduced resistance to stress. Magnesium is found in leafy greens, nuts, and seeds. The ones packing the highest punch are spinach and pumpkin seeds. 3. Skullcap An herb used for insomnia in humans, it has a similar mechanism of action to Valerian. Skullcap is thought to be GABAergic. But it is also thought to influence serotonin receptors, which is why it has reported sedative and relaxing effects. A small, placebo-controlled, double-blind, crossover study of 43 human participants demonstrated that skullcap reduced symptoms of anxiety and depression in some individuals without causing an observable reduction in energy or cognition. In both cats and dogs, skullcap has been effective in general nervousness and excitability and in any condition where there is oversensitivity in the nervous system. 4. B-Vitamins Many of the B-Vitamins are involved in functions which directly impact the brain and nervous system. To single them out specifically, B12 and folate are reportedly low in cases of mood disorders in humans. B-vitamins can become depleted during times of stress, the more the body requires them for tasks the more they need replenishing. Stress also affects the lining in the stomach and compromises its function. Intrinsic factor is essential in B12 absorption but lack of production due to compromised function can significantly affect B12 levels. B-Vitamins can be found in eggs, liver, kidneys, chicken, red meat, tuna, mackerel, salmon, shellfish and dark green vegetables like spinach and kale. 5. Zinc In human literature, zinc is a trait marker of a mood disorder. Zinc deficiency is regularly associated with depression and anxiety, and supplementation often improves mood and cognitive function. We know zinc plays a role in mood because we find zinc enriched neurons in parts of the brain associated with emotions. Before we knew better, in rat studies, we found that increasing zinc levels reduced rat-fighting behaviour and when supplemented alongside antidepressant medication, rats developed improved resilience. Great source of zinc: Oysters, beef, chicken, pork, hemp seeds, shiitake mushrooms and red meat. We would always advocate a food first approach in supporting your dog, but there may be occasions where supplements will be beneficial. Calm Complex contains many of the nutraceuticals and herbs required to help calm the nervous system. If you would like any support with your dog’s health, please check out our services to see how we can help. Thanks for reading, MPN Team
Christmas can be a little chaotic at the best of times; some of our companions love the attention from all the visitors, but some can get a little overwhelmed. There are many strategies that we can employ for our furry friends to get through this time of year unscathed, but we can also support them nutritionally too! Here are our top nutritional tips for canines this Christmas. Max Out On Magnesium! Magnesium excretion is increased during times of stress. Catecholamines and corticosteroids enhance the shift of magnesium from inside the cell to outside of the cell leading to increased urinary excretion. In turn, low magnesium levels increase the release of stress-associated hormones. This unfortunately creates a cycle of a reduced resistance to stress. Offer your dog plenty of magnesium rich foods like leafy greens, nuts and seeds. Time for Tea! L-Theanine is seen to facilitate the generation of alpha waves which are indicative of a relaxed but awake and alert state. L-Theanine helps regulate the usual stress responses like increased blood pressure, heart rate and cortisol secretion and it’s found in our trusty tea! Green tea packs the highest content, so brew up a cup of decaf and share it with your pooch this Christmas. Dose up on D! Did you know that Vitamin D deficiency is associated with increased anxiety scores? Whilst we know it plays a role in immune function, it also contributes to cognitive function along with mood and behaviour. Add plenty of fresh foods containing Vitamin D to your dog’s bowl, including: liver, fish and eggs! Mushrooms are a great source too, and if you keep them in the windowsill, you’ll get even more Vitamin D too! Always remember to saute mushrooms before feeding. Build Up Your B’s! B vitamins are heavily involved in the synthesis and breakdown of stress hormones. Whenever we or our dogs are stressed, we release a cascade of hormones that help us manage the threat in front of us. When the threat has passed, those hormones need to be broken down so our bodily functions can return to normal. It goes without saying, the more often our bodies have to do this, the higher the demand for B vitamins (and more). B vitamins are water-soluble, meaning they need to be replenished daily, and this is even without any stressors we may be facing. Offer your dog plenty of sources of B vitamins in their bowls like seafood, poultry, red meat, leafy greens and seeds! Our wonderful Calm Complex provides all of the above. br] br] Fill up on Ferments! This may not apply to all dogs; especially if you are tackling an itchy issue, but there is increasing data highlighting that poor microbial diversity in the gut is linked with increased scores of anxiety. A great way to support microbial diversity is to ensure the diet contains both pre and probiotic foods. Prebiotic sources include: mushrooms, dandelion greens, garlic, burdock root and more. Probiotic foods include fermented products like kefir. Aside from certain nutrients, we also know how important chewing is in engaging the parasympathetic nervous system – which is the rest and digest side of the stress response. This is why offering whole foods, which take some chewing, is great for your dog’s physical and emotional health. Why Dogs Need To Chew Other top (non-nutritional) tips for supporting your overwhelmed canine this Christmas: Set up a safe space – this can be a covered crate or simply a quiet spot somewhere in the house. Try to maintain as much of the routine as possible, Head out on walks when it’s quiet – when everyone is driving home for Christmas at the same time, it can get a little unnerving for your anxious pooch. If you would like any support with your pets, then please check out our services. Thanks for reading, MPN Team
Sadly, anxiety is as common in dogs as it is in humans. Anxiety is the body’s normal response to stress; the problem is that our stress response hasn’t evolved with modern life and both us and our dogs often feel overwhelmed. A stressful situation can bring about a whole cascade of biological responses and it all starts in the brain. When someone confronts an oncoming danger, the eyes or ears, or both (and parts of the peripheral nervous system) send the information to the amygdala, which is the area of the brain that deals with emotions. The amygdala interprets the images and sounds and sends a message to the hypothalamus. The hypothalamus is like the command centre. It communicates with the rest of the body through the autonomic nervous system, which controls such involuntary body functions like breathing, blood pressure and heartbeat. It also controls the dilation or constriction of key blood vessels and small airways in the lungs called bronchioles. The autonomic nervous system is further split into two branches, the sympathetic nervous system and the parasympathetic nervous system. The sympathetic nervous system functions like a gas pedal in a car and it triggers the fight-or-flight response. The parasympathetic nervous system is like the brake pedal; it slows everything back down and returns the body to homeostasis, or as we know it, rest and digest. In cases of anxiety, the sympathetic nervous system remains activated, it’s a form of chronic stress. So, when tackling anxiety, we need to take the paw off the gas pedal, and firmly place it on the brake. It goes without saying that removing the trigger that causes the stress or anxiety is of paramount importance, but in many cases, like on bonfire night, we can’t remove it in its entirety. In cases of separation anxiety too, we often want to take the edge off the response in order to work through a behavioural programme. 1) Thunder Jackets These jackets work under the premise that applied pressure calms nervous system function and many owners report success. A study in the Journal of Veterinary Behaviour explored a range of methods for managing firework fear in dogs with the following efficacy: Pressure jackets 44% Counterconditioning 70% Relaxation training 69% Noise CDs 55% 2) Chamomile Chamomile (Matricaria recutita) is one of the most widely used herbal remedies in the world. While there are many varieties of chamomile, Roman (A. nobilis) and German (M. recutita) are the most widely used forms. These are members of the Compositae (Asteracae) family. German chamomile is considered the more potent and is most widely used. It has many medicinal uses including carminative (anti-colic), antiseptic, and anxiolytic. Chamomile is notorious for its continuous bloom! Chamomile serves as a safe, general purpose calming herb that doesn’t taste too shabby either. In human tests it has been effective in mild to moderate generalized anxiety disorder. Findings Here It can be served as a tea, but is also available as an oil infusion, tincture, salve and ointment. 3) Valerian Many will recognise valerian for its similar smell to old, dirty socks! Valerian (Valeriana officinalis) is commonly used for the treatment of insomnia and anxiety disorders in humans. It has a mechanism of action similar to benzodiazepines; however, instead of binding to the gamma subunit like a benzodiazepine, it appears to bind to the beta subunit on the GABA-A receptor instead. Regardless, it has the same effect on chloride movement into the neuron when the major inhibitory neurotransmitter, GABA, binds to the GABA-A receptor, thereby causing a hyperpolarized state. In addition, valerian has also been shown to decrease the removal or metabolism of GABA, thereby allowing GABA to stay around longer and do it’s thing. And as we know, GABA is the brake like neurotransmitter in the body. Findings Here Valerian is available in tincture, tea and fresh or dried root. 4) Skullcap Another herb used for insomnia in humans, it has a similar mechanism of action to Valerian. Skullcap too is thought to be GABAergic. But it is also thought to have an effect on serotonin receptors, which is why it has reported sedative and relaxing effects. A small, placebo-controlled, double-blind, crossover study of 43 human participants demonstrated that skullcap reduced symptoms of anxiety and depression in some individuals without causing an observable reduction in energy or cognition. In both cats and dogs, skullcap has been effective in generous nervousness and excitability and in any condition where there is oversensitivity in the nervous system. Skullcap is usually found in dried herb or tincture form. 5) St John’s Wort St. John’s Wort (Hypericum perforatum) is an herbal medication that consists of anthraquinones, which have displayed anti-inflammatory and anti-cancer effects. It has also been used as an antidepressant in humans. It derives from a flowering plant found in Europe and Asia. It is usually found in capsule, tea, or liquid extract. It is thought that St. John’s Wort acts as a serotonin reuptake inhibitor. This works to reduce the uptake of serotonin at neuronal synapses, as well as dopamine and norepinephrine. One of the primary adverse effects is the risk of an increase in serotonin when combined with certain antidepressants and the inhibition of monoamine oxidase. Be cautious of signs including tachycardia, increased blood pressure and mydriasis. There may also be a fever. It is however, often used in dogs with fear-based or separation anxiety. A great product for anxiety is our Calming Complex Calm Complex The introduction of any new supplement or herb is always done best under the guidance of a practitioner. If your dog suffers with anxiety, it’s crucial to work within a behaviour programme to tackle key triggers. However, there can also be a multi-modal approach and our services may be of use. Please take a look under our “what we offer” tab! Thanks for reading, Team MPN x
In our last blog we considered the importance of minerals for your dog’s health, but we only got so far. There are further minerals, ones we deem trace minerals, which are also important to optimal health. So, let’s get cracking. Chromium Within human realms, chromium is mostly talked about for its role in modulating blood glucose levels. It is considered that chromium acts as a cofactor that can enhance the effects of insulin on target tissues. In states of chromium deficiency, abnormal glucose utilisation results along with increased insulin demands. Findings Here Along with potentiating the action of insulin, chromium increases uptake of amino acids into muscle, heart, and liver and enhances protein synthesis. It also plays a role in regulating blood lipids. Increased Risk of Deficiency: Diets high in sugars and refined carbohydrates (results in increased urinary excretion of chromium) Increased stress (physical activity, infection, trauma or illness) Pregnancy Ageing Sources of Chromium: Broccoli Turkey Chicken Brewer’s Yeast Cobalt One of the things you may not have realised about Cobalt is that it is an integral part of Vitamin B12 (cobalamin – get it?). Why Your Dog Needs Vitamin B12 Cobalt is therefore essential for the function of cells. It is involved in the production of red blood cells and the production of antibacterial and antiviral compounds that prevent infections. This mineral plays a key role in the metabolism of fats and carbohydrates as well as the synthesis of proteins and conversion of folate in their active form. In the nervous system, cobalt also plays a role in the prevention of demyelination, which is a condition that results in damage to the membrane that covers the nerve fibres in the brain and spinal cord. This ensures efficient nerve transmission. Copper Copper has a number of functions throughout the body including: Energy production in mitochondria Mobilisation and transfer or iron from storage sites to the bone marrow Synthesis of collagen and elastin in connective tissue Acts as an antioxidant (as zinc/copper superoxide dismutase) Supports synthesis of melanin in the skin Synthesis of adrenaline and noradrenaline in the nervous system Breakdown of serotonin, histamine and dopamine Increased Risk of Deficiency: High intakes of supplemental iron, molybdenum, or zinc Prolonged use of proton pump inhibitors (acid reducers) Gastrointestinal disorders (chronic diarrhoea, inflammatory bowel disease) Increased levels of oxidative stress (air pollution, toxin exposure) Signs of Deficiency: Anaemia Increased vulnerability to oxidative damage Reduced immune responses Abnormal skeletal growth Changes and loss of hair and skin pigmentation Lethargy Excessive copper build-up in the liver can cause liver disease in some dogs. Common breeds of dog that are affected include Bedlington terriers, Labrador retrievers, and Dalmatians. There are clear genetic implications found in Bedlington Terriers which prevents normal copper excretion. Three forms of the disease occur: (i) asymptomatic – in which signs are yet to develop, (ii) acute -seen in dogs up to six years of age, with the sudden onset of severe illness shown as depression, anorexia (not eating) vomiting and possibly jaundice (yellowing of mucous membranes, whites of eyes and skin), and (iii) chronic – seen in middle-aged dogs with signs of chronic liver damage and sometimes failure which may show vomiting, weight loss, jaundice and abdominal swelling. It is considered that many commercial dog foods report total copper levels as higher than recommended, and some home-made diets may not furnish adequate amounts of copper. Findings Here That said, data indicates that copper absorption is greater when diets are animal protein rather than plant protein. Findings Here Iodine An essential mineral, iodine is used by the thyroid gland to make thyroid hormones that control many functions in the body including growth and development. If you would like to learn more about the thyroid gland and the conditions that often affect it, check out our blogs here: Hypothyroidism Hyperthyroidism Hyperthyroidism in Cats Iodine can only be obtained from diet or in supplemental form. Of interest, concurrent deficiencies in selenium, iron or vitamin A may exacerbate the effects of iodine deficiency. Seaweed like wakame are rich in iodine, but other sources include eggs and poultry. Iron Functions: Oxygen transport Oxygen storage as myoglobin Energy production Cofactor for multiple enzymes Production of neurotransmitters and thyroid hormone There are two sources of iron, haem, and non-haem. Haem is found primarily in meat and meat products where non-haem is found in plants. Haem is generally well-absorbed, whereas non-haem absorption is largely affected by other factors. Common inhibitors of iron absorption are phytates, tannins, starch, and proton pump inhibitors. The body has three unique mechanisms for maintaining iron balance and preventing deficiency and overload: Storage of iron Reutilisation of iron Regulation of iron absorption Iron from food is mainly absorbed in the duodenum. Iron can be in ferrous state (Fe2+) or ferric state (Fe3+). Fe3+ is not directly absorbed, but Fe2+ is easily absorbed. In the intestine, Fe3+ is converted by ferric reductases into Fe2+. When required by the body, iron is transported by transferrin to bone marrow and other tissues. Iron is required for the transport of oxygen, oxygen storage in muscle and is also a component of energy production. After absorption, any iron that isn’t needed, is stored as ferritin in the liver, spleen, or bone marrow. During times of high need, iron is then released. Most of the iron in the body is contained within red blood cells. Red blood cells have been noted to have a life span of around 110-120 days but when they reach the end of their life span, they release iron. The resultant liberated iron can be reused to produce new erythrocytes in bone marrow, stored as ferritin or released back into systemic circulation. Iron deficiency anaemia is the common condition associated with decreased iron levels, resulting in low circulating haemoglobin and reduced myoglobin. Iron deficiency is also associated with lower T and B lymphocyte, macrophage, and neutrophil function. Your Pet’s Immune System On the other side of the scale, iron toxicity is generally associated with supplementation. At a
As we know bacteria is everywhere, both the good ones and the not so good ones. Sometimes the bad ones can get a little out of hand and start causing a whole host of problems, we know this as bacterial overgrowth and we’re going to be looking at small intestinal bacterial overgrowth, or SIBO specifically. Here at My Pet Nutritionist is something we keep an eye out for, so we thought we’d let you know why. Small intestinal bacterial overgrowth (SIBO) is defined as excessive bacteria in the small intestine. SIBO is frequently implicated as the cause of chronic diarrhoea and malabsorption. Dogs with SIBO may suffer from unintentional weight loss, nutritional deficiencies, and osteoporosis for example. When we reference the microbiome, we are considering the microbial community found in the whole of the digestive tract. Generally, the further down we go, the more bugs we find. So, we would expect the majority of the bugs to be found in the colon. SIBO is when there are higher numbers found in the small intestine. The type of microbial flora present plays an important role in the manifestation of signs and symptoms of overgrowth. For example, a predominance of bacteria that metabolize bile salts to unconjugated or insoluble compounds may lead to fat malabsorption or bile acid diarrhoea. In contrast, microorganisms that preferentially metabolize carbohydrates to short-chain fatty acids and gas may produce bloating without diarrhoea because the metabolic products can be absorbed. There are a number of contributing factors to the development of SIBO but two of the main ones are gastric acid secretion and small intestine dysmotility. Gastric Acid Gastric acid is necessary in the digestion of food. Not only that but it suppresses the growth of ingested bacteria (it forms one of the protective barriers), which limits bacterial counts in the upper small intestine. Gastric acid is produced in the stomach, so it provides a buffer before compounds even reach the small intestine. Gastric acid is produced by the parietal cells in the stomach, and there are cases of autoimmunity whereby the body attacks its own parietal cells resulting in low levels of gastric acid. Not only that but certain medications like proton pump inhibitors are also used to suppress gastric acid. Antihistamine medications also suppress gastric acid secretion. PPIs are often used to treat a range of GI disorders in dogs and antihistamines are regularly used to treat allergic dermatitis. In addition, gastric acid secretion is regulated by the parasympathetic nervous system via the vagus nerve and there is clear evidence that increased levels of certain stress hormones inhibits the release of it. Can Stress Affect My Dog’s Digestive System The stress response also plays a role in intestinal motility. Intestinal Motility Several programmed movements are responsible for the transport of food between the different parts of the digestive system. Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. The migrating motor complex typically moves between the stomach and small intestine, sweeping the intestine clean between meals; this is the rumble you will hear! Hormones like motilin and ghrelin are involved in the generation of MMCs. Mass movement is another programmed movement, and this is what propels the formed poop into the rectum, ready for evacuation. Mass movements are put on hold overnight but start again in the morning. They follow their own circadian rhythm. Impaired gastric motility can result in food and waste sitting in the small intestine for longer that it should. There are a number of reasons why motility may be affected. Mechanical obstruction, Abnormalities in smooth muscle function, Secondary conditions such as electrolyte disturbances, metabolic disorders, concurrent medication use, stress, and abdominal inflammation. However, there is more attention being paid to the development of SIBO through antigens gaining access to the lamina propria. The lamina propria is a thin layer of connective tissue that forms part of the moist linings known as mucous membranes or mucosa which line the respiratory and gastrointestinal tract. It is therefore thought that a compromised mucosal barrier is a risk factor for SIBO. The mucus layer is the very first line of physical defence that external molecules encounter when they arrive in the gut lumen, it prevents bacteria from directly contacting the epithelial cells, along with toxic substances and digestive enzymes. Within this strand, it therefore prevents colonic inflammation. The main building blocks of the mucus layer are highly glycosylated mucin proteins that form a gel-like sieve structure overlying the intestinal epithelium. The small intestine only has one mucus gel layer whereas the colon has two layers: an outer, loose layer that allows the long-term colonisation of commensal bacteria, and an inner dense layer empty of bacteria. Mucin degradation has been recognized as a normal process of mucus turn-over in the GI tract, but selective bacterial species can degrade mucous glycans as an energy source in the absence of other food sources and so if degradation outperforms secretion, we start to have a problem. Furthermore, diets high in refined products, sugars and saturated fats are also associated with compromised mucosal function. Early stress is also linked to impaired mucosal development, so the health of our puppy’s gut really does start with the Mother! Prevalence of SIBO SIBO has also been noted in dogs with existing chronic intestinal disease, and although many breeds are affected, German Shepherds are seemingly predominant in reports. SIBO is regularly seen in dogs with exocrine pancreatic sufficiency. Juice culture is the gold standard for SIBO diagnosis, but it is often described as being technically difficult, time-consuming and expensive. In addition, bacterial counts may be influenced by environmental factors and infective load. One of the first things to consider is whether your dog is currently eating an antigenic diet – with the increased intestinal permeability that often accompanies SIBO, establishing sensitivities is a good place to start. Elimination Diets For Dogs In addition to this, if SIBO has been prolonged there may be underlying nutrient deficiencies so
Calcium is one of the most abundant minerals in the body. We tend to notice it for its role in bone health, but it’s also involved in muscle contraction and cardiovascular health. There’s a lot of information out there around calcium, especially in the growing dog, so let’s take a look at its function, balance and some of My Pet Nutritionist’s favourite sources. What is Calcium? Calcium is a metal with the symbol Ca, it is also defined as an electrolyte. Calcium ions play a role in: Physiological and biochemical processes in the body Signal pathways Messengers in neurotransmitter release from neurons Contractions of all muscle cell types Cofactors in many enzymes Fertilisation Calcium Balance Only a small percentage of total body calcium is needed for the above roles, the rest is stored in bones and teeth for structural support. When calcium intake is low or malabsorbed, the body will pull stored calcium from bones to maintain normal functioning. This is what leads to poor bone health – the body is always cashing in on its stores! Calcium balance or homeostasis is regulated by parathyroid hormone, calcitriol and calcitonin. When blood calcium levels drop, the parathyroid glands secrete parathyroid hormone (PTH) which stimulates the conversion of vitamin D in the kidneys to its active form calcitriol. This decreases urinary excretion of calcium but raises urinary excretion of phosphorus. Elevated PTH also promotes bone resorption (break down) which releases calcium and phosphorus into the blood from bones. Higher calcitriol concentrations increase intestinal absorption of calcium oh phosphorus too! As calcium levels normalise, PTH secretion stops and the thyroid gland secretes the hormone, calcitonin. This reduces bone resorption and well as calcium absorption and promotes urinary calcium excretion again. Bone Health The skeleton is essential as a supporting framework. It consists of strong, mineralised bone which form a sophisticated system to facilitate movement. Bone is a light, yet strong connective tissue consisting of around 30% collagen and other matrix proteins with around 70% minerals. These minerals obviously include calcium and phosphorus but magnesium, sodium and potassium are also present in conjugated form. Also known as ossification, bone formation is a process where new bone is produced. Look at any large breed and it’s clear to see how much new bone needs to be produced from birth to full skeletal maturity. Bone starts as a cartilage model which gets slowly replaced. Osteoblasts are the cells that form new bone. They secrete osteoids. Osteoid tissue is simply unmineralized bone tissue. Soon after the osteoid is laid down, inorganic salts (calcium and phosphorus) are deposited which forms the hardened material that we know as bone. Bone formation proceeds outwards from ossification centres; short bones tend to have one in the middle whereas long bones typically have three, one at each end and one in the middle. Ossification, or bone formation continues until there is a thin strip of cartilage left at each end of the bone. This is known as the epiphyseal plate, or growth plate in the dog world. When the bone reaches full adult maturity, the cartilage is replaced with bone and “sealed” for want of a better word. It is widely recognised that bone mass and density are determined by various concurrent factors, such as genetics, hormones, physical activity, and certainly, nutrition. While genetic factors have a critical role in growth and peak bone development, an adequate intake of bone nutrients represents the main factor for the full expression of a given genetic potential and for bone maintenance during adulthood. An optimal calcium intake is necessary for bone health at all stages of life. Dietary requirements for calcium are determined by the need for bone development and bone maintenance, which vary throughout life, being higher during puppy-hood, adolescence, during pregnancy and lactation, and in the aging dog. The risk of bone loss is increased in: Low calcium diets, Low protein diets, Hyperthyroidism, Oestrogen deficiency (of interest in spayed females) Findings Here Findings Here Findings Here Too Much Calcium Lifelong physical activity with adequate calcium and vitamin D slow the rate of bone loss. Interestingly, in humans, supplemental calcium leading to excessive calcium intake has been seen to reduce the bone growth stimulating effects of PTH. Furthermore, PTH suppression caused by high calcium intake is thought to reduce magnesium absorption. However, one study following dogs for a 40-week period, notes that adult dogs are capable of regulating calcium balance with no adverse effects on health. It was concluded that when exposed to increased Ca levels, dogs will reduce intestinal absorption, so excretion increases via faeces and urine. It is posited that this is an evolutionary adaption, because dogs are inherent scavengers likely to consume large, infrequent meals high in Ca-rich bony material, rather than Ca-deficient foods. This was explored further, and adult dogs fed a Ca deficient diet did not adjust their Ca excretion leading to negative calcium balance. Findings Here That said, this study was based on a dry diet and the authors themselves posit digestibility as a limitation. “Commercial dog diets contain raw ingredients and undergo processing such as extrusion and cooking, which generally limit Dry Matter digestibility, and consequently lower Ca availability.” They suggest that home-prepared diets with high digestibility may increase Ca absorption and result in a positive Ca balance instead. The bottom line? Opt for a fresh-food diet with sources of calcium and always speak with a qualified practitioner before considering supplementation. Muscle Contraction The muscular system is made up of muscle tissue and is responsible for functions such as maintenance of posture and control of various circulatory systems. This includes the beating of the heart and the movement of food through the digestive system. The muscular system is strongly associated with the skeletal system in facilitating movement. Both voluntary and involuntary muscular system functions are controlled by the nervous system. Muscle is a highly specialised soft tissue that produces tension which results in the generation of force. Muscle cells, or myocytes, contain myofibrils comprised of actin
