Here at My Pet Nutritionist, we don’t like to leave any stone unturned – pun not intended! When it comes to a diagnosis of bladder stones/crystals, it can feel like you’re embarking on a never ending journey. You will find lots of information on each type of bladder stone found in dogs, but this blog post focusses on Struvite Stones. What are Struvite Crystals/Stones? Struvite Crystals are the most common type of crystal found in dogs, and when combined with Urease, a bacteria-produced enzyme, struvite stones are formed. Struvite crystals being present in the urine by themselves, aren’t much of a worry, however when they are combined with the aforementioned Urease, struvite stones do become a problem, and require treatment. Struvite stones also develop as a result of infection by other bacteria types including Proteus, and Staphylococci strains. There are two other names you may see for Struvite Stones, and these are due to their chemical make up; these are: Magnesium-ammonium-phosphate Triple phosphate Female dogs are more at risk of developing struvite stones, with a staggering 85% of cases being seen in female dogs! Dogs with recurring UTIs (urinary tract infections) are also among the most likely to develop struvite stones. Symptoms of Struvite Stones A range of different symptoms may occur if your dog develops struvite stones, including: Blood in urine ‘downward dog’ position indicating stomach pain Frequent urination Urinary incontinence/urinating in unusual places Difficulty urinating Regular licking of the genitals Increased thirst Nausea Findings Here How Do They Form? Struvite Stones thrive in an alkaline environment. When looking at the pH of your dog’s urine using a pH test strip, alkaline urine will show as a blue or purple tone. The healthy range of canine urine is between 6.5 and 7, which is neutral, or very slightly acidic. Anything above pH7 is alkaline. When the body undergoes bacterial infection in the bladder, ammonia is produced, which in turn causes the pH to become more alkaline, allowing the formation of struvite stones to occur. Findings Here Diagnosis of Struvite Stones The easiest way to diagnose struvite stones in dogs, is via X-Ray, however sometimes this isn’t possible due to other parts of the body getting in the way of a clear image. X-Rays use radiowaves, and produce Radiographs (hence those who take the images are known as radiographers!). Struvite stones are radiodense, which means they would show up very easily in X-Rays. In cases where X-Rays are not possible, the veterinarian may use ultrasound on the bladder area. Before scans, the veterinarian may give a coloured liquid to the dog which dyes the stones, making them more visible. The accompanying step to working out the type of stone present, is through urinalysis. Urine samples are needed to find out if any bacteria or crystals are present – this can help determine the type of stone, since bladder stones aren’t very easy to tell apart through imaging alone. If a sample of a stone is taken, this can be analysed by a veterinary laboratory for an official diagnosis of stone type. Findings Here What Can the Vet Do? Much like the removal of another type of bladder stone, the Cysteine Stone, the vet may suggest surgical removal. The surgical procedure is called a Ureteroscopy, during which a very small instrument is passed through the bladder and up the Ureter, pushing the stone out in the process. Alternatively, the pet may be opened up, and large stones causing blockages will be removed by hand. For a non-surgical, less invasive approach, the vet may recommend a procedure known as a urohyrdopropulsion. This procedure is usually most successful on medium to large dogs, and involves two catheters being placed in the dog; one up the urethra, and the other in the urethral lumen. A finger is inserted into the rectum to push against the urethra, causing a build up of pressure and a tight seal. Once a tight seal is made, saline water is flushed through the catheters, and the bladder is palpated, flushing the small stones out. Although this method requires anaesthesia, it is preferred for smaller stones as it is much less invasive than surgery. Findings Here Your veterinarian may suggest a diet change too – however they may wish to sell you a ‘prescription’ dry food diet. This is where fresh feeding is paramount, as dry foods have a low meat content, and low moisture – both of which are essential in abundance for a dog with bladder stones! Let’s take a look at diet, and supplements to help prevent Struvite Stones. Supporting the Body, and Preventing Struvite Stones When it comes to supporting the body with the aim to reduce the risk of recurring Struvite Stones, we need to look at the diet, as well as suitable supplementation. Diet Dogs with any bladder stones, require a high moisture diet! Fresh feeding, whether that’s raw or gently cooked, allows for meals to be suitably high in moisture. You may even wish to ‘float’ the food – meaning you add extra water to it. The other benefit of providing a fresh diet, is the high meat content. Feeding a predominantly meat based diet is essential for those suffering from Struvite Stones as meat naturally encourages a more acidic environment in the bladder. Some ingredients to consider including in your dog’s diet, to promote an acidic environment include: Chicken Pork Beef Eggs Fish Venison Meanwhile, it’s best to avoid more alkaline food like: Broccoli Carrot Cucumber Pumpkin Kale Sweet potato Apple Banana Cabbage Pumpkin We have two recipes balanced to FEDIAF, which are ideal for those with struvite stones – Low Fat Fish and Low Fat Venison. Supplements A number of supplements can be very useful in the combatting of Struvite Stones. Gut Health supplements are one of the most important ones to give, as with almost any condition, a healthy gut microbiome helps. When urea is excreted into the gut passage, it is broken down by the bacterial colonies in
Here at My Pet Nutritionist, we often help pet owners battle with oxalate crystals/stones in their pets. A diagnosis of any urinary stone can seem daunting, but that’s where we can step in to help! This is a handy guide to the ins-and-outs of Calcium Oxalate stones! What are Oxalate Stones? Oxalate stones, formally known as Calcium Oxalate stones, are formed of microscopic crystals of calcium oxalate. They’re the second most common type of urinary stone found in dogs, second to Struvite stones. If left untreated, oxalate crystals are one of the leading causes of kidneys stones. Males tend to get diagnosed with oxalate stones more often than females, and they’re more common in older dogs than they are in younger dogs. Some breeds are predisposed to Oxalate Stones. These include: Miniature schnauzer Yorkshire terrier Lhasa apso Bichon frise Shih Tzu Miniature poodle Chihuahua Jack Russel Findings Here Findings Here Symptoms of Oxalate Stones There are a number of symptoms caused by oxalate stones, including: Difficulty urinating Bloody or cloudy urine Smelly urine Frequent urination Distended abdomen Lack of appetite Changes in behaviour Lethargy Vomiting If your dog has such symptoms, it’s important to seek veterinary assistance. How Do They Form? Studies show that feeding a diet that causes high levels of urine acidity can contribute to the formation of oxalate stones. Research suggests that urine high in calcium, citrates and oxalates (these changes to urine are largely controlled by diet) can increase the risk of the dog having oxalate stones. Breed, and sex predisposition are huge factors in the formation of oxalate stones, alongside the aforementioned dietary factors. Findings Here Findings Here Diagnosis, and Getting Rid of Oxalate Stones When taken to the vet, the dog will have a blood sample taken, and a full blood panel will be run. A urinalysis will also be performed to check for increased levels of acidity, calcium, citrates and oxalates. If bladder stones are not able to be felt through palpation of the bladder, an x-ray may be performed to work out exactly what we are dealing with. Unfortunately, oxalate stones usually require surgical intervention, as they cannot be dissolved once formed. Like with Cysteine stones, smaller crystals may be able to be flushed out using urohydropropulsion, however as these crystals, untreated, can grow rapidly and cause urine infections, most veterinary surgeons would prefer to operate and remove all crystals as a first port of call. Findings Here Supporting the Body, and Preventing Oxalate Stones There are many ways we can support the body to prevent recurring formation of oxalate stones. Let’s discuss these! Probiotics Studies show that probiotics are effective at breaking down oxalates in the digestive system, so it’s wise to give a good, broad spectrum probiotic every day. Avoid high calcium, acidic, and high oxalate foods It’s incredibly important to keep the pH of the urine as alkaline as possible. There are certain foods we recommend to avoid feeding your dog if they have history of oxalate stone development. These include: Spinach (high in oxalates) Leafy Greens (the darker they are, the more oxalates they contain) Beets (high in oxalates) Citrus fruits (high in citrates and oxalates) Legumes (high in lectin, and oxalates) Beans (high in lectin and oxalates) Nuts and seeds (high in oxalates) Berries (high in oxalates) Increase moisture intake Always insure your dog is drinking plenty of water! A high moisture diet is also incredibly important, be it raw, or freshly cooked. You can also ‘float’ the food, by adding extra water to it. Check out our low oxalate recipe here! Limit sodium intake Another reason to avoid dry foods, is that they’re often high in salt. Salt is very dehydrating on the body, so it’s important to limit sodium intake. Findings Here Findings Here Findings Here Has your dog been diagnosed with Oxalate, of any other type of urinary tones? If the answer is YES, don’t hesitate to book a consultation with one of our team! Team MPN x
At My Pet Nutritionist, we often get enquiries about dogs suffering with urinary crystals or bladder stones. One of the types of crystal often diagnosed, is the Cysteine crystal. What are Cysteine Stones? There are 4 main types of bladder stone/crystal; Struvite, Calcium Oxalate, Urate, and Cysteine. Cysteine stones are uroliths (solidified lumps of crystalloids) which can form in the bladder, urinary tract, or kidneys. Of the four stones, Cysteine stones are incredibly rare, with only around 1% of diagnoses being Cysteine. While these stones can happen in female dogs, they are most common in males. Learn more about the different types of stone in our blog here! How are Cysteine Stones Formed? The amino acid, Cystine, is made by the body after synthesis of methionine. Cysteine can also be found in some higher protein foods. It is reabsorbed by the kidneys, but when the kidneys are unable to absorb it, a condition called cystinuria occurs. When this happens, the cystine becomes very concentrated in the urine, which causes the formation of Cysteine bladder or kidney stones. As with each type of urinary stone, there are some unique characteristics associated with it; these stones only form in acidic urine. Dogs with more alkaline urine will not form this stone. The risk of cysteine stones forming, may also be down to genetic abnormalities. Findings Here Findings Here Symptoms of Cysteine Stones Though similar for other stone types, some symptoms your pet may show are: Frequent, sometimes bloody urine Painful urination Excessive drinking Nausea and vomiting Breed Predisposition Some breeds of dog are genetically predisposed to Cysteine stones, and may require regular treatment, as this type of stone is often a recurrent issue. Breeds predisposed to Cysteine stones include: Basset Hounds Dachshunds Newfoundlands (unusual female cases have been recorded in this breed) Bullmastiffs English Bulldogs Irish Terriers Findings Here What Can the Vet Do? Surgery Often required for those with larger stones, surgery is a very common path to take when battling Cysteine stones. The surgical procedure is called a Ureteroscopy, during which a very small instrument is passed through the bladder and up the Ureter, pushing the stone out in the process. Alternatively, the pet may be opened up, and large stones causing blockages will be removed by hand. Findings Here Non-Surgical Removal There is a non-surgical option available for those with very small cysteine stones; this procedure is known as urohyrdopropulsion. This procedure is usually most successful on medium to large dogs, and involves two catheters being placed in the dog; one up the urethra, and the other in the urethral lumen. A finger is inserted into the rectum to push against the urethra, causing a build up of pressure and a tight seal. Once a tight seal is made, saline water is flushed through the catheters, and the bladder is palpated, flushing the small stones out. Although this method requires anaesthesia, it is preferred for smaller stones as it is much less invasive than surgery. Findings Here How Can we Support the Body? Diet Diet plays a huge role in the prevention of Cysteine stones. With these stones, its advisable to feed a normal amount of calcium, but slightly lower protein, and also low salt (to avoid water retention/dehydration). As well as these specific nutrient requirements, it is imperative that your dog’s diet includes as much moisture as possible! Moisture in the diet will help flush the bladder; feeding a dry food would dehydrate the dog, and could worsen the issue. Feeding a fresh food is very much recommended for any bladder stone, including Cysteine! Findings Here Find our recipe suitable for dogs suffering from cysteine stones here! Supplements Omega 3 in the form of Alpha Linoleic Acid (ALA) is thought to inhibit cysteine crystal formation, due to it’s anti-inflammatory, and antioxidant properties. ALA can be found in leafy greens, nuts (avoid peanuts, and macadamia nuts), and animal fat. Findings Here Selenium has been proven to reduce the volume of cysteine crystal formation. When looking for a supplement, ensure it is as pure as possible. Findings Here Bonus Factoid: Cystinuria Type 3 Cystinuria Type 3 is a cysteine based, androgen dependent disease which means it only affects entire males. Bulldog breeds are particularly prone to this condition. The veterinary treatment is the same as standard cysteine stones, regarding urohyrdopropulsion, however in order to stop this painful condition from recurring regularly, the only method of prevention is castration. Neutering should be discussed with your veterinarian, and performed at the right time if your dog is a frequent sufferer of Cystinuria Type 3 flare ups. Findings Here If your dog has been suffering with recurring cysteine stones or crystals, consider booking in with one of our team! Team MPN x
Here at My Pet Nutritionist, we see quite a few clients with differing bladder stones, often accompanied by other disease. Let’s delve into the different stones and the types of diets we may want to feed. What are Urinary Stones? There are several types of stones that form within the urinary system, each needing a different environment and mineral composition to be able to form. 95% of stones occur within the bladder and only 5% within the kidney, for both cats and dogs. Stones develop when a multitude of microscopic crystals clump together, this doesn’t always happen and so crystals can exist without forming stones. As crystals clump together, they form small stones which can become larger over time and pose more of a problem as the issue gets larger and more painful. When crystals form into small stones they can become life threatening if the stones get lodged in the exit of the bladder thus blocking the exit route. Crystals form from dissolved minerals within the urine in the bladder. These minerals enter the bladder via the kidneys from waste products via food. Altered urinary pH has a role to play in the formation of stones and crystals. Urine pH varies depending on the animal’s diet (Nelson et al) due to the waste products which have been filtered and excreted by the kidney. Symptoms of bladder stones include: Irritation of the bladder lining Blood in the urine Pain when passing urine Urinating small amounts frequently Persistent need to urinate Cloudy or discoloured urine Bloated or sensitive stomach Pain in the abdomen or kidney region Bladder stones are seen more frequently in dogs that experience bladder infections. In our experience we see this due to antibiotic use, a carbohydrate dense diet, poor gut microbiota, food intolerances, food allergies, dehydration and the like. Research has shown some common causes of kidney and bladder stones in canines which tend to be more standard. Causes of these stones can be from the following: Genetics Water Consumption Amount of water in the diet Quantity of and Quality of protein The pH of a dog’s urine Infections Crystals in the urine are diagnosed by a microscopic examination of fresh urine to determine the type of crystal. The urine will also be tested with a strip to determine pH level and presence of blood, White Blood Cells, protein levels and concentration or specific gravity. Determining the type of crystal is very important before we can recommend a suitable diet. These are struvite, oxalate, urate and cystine crystals. Treatment By far the most important way of combatting crystal formation is by adding water to the diet. Feeding moist foods dilutes the urine and promotes more frequent urination. This in turn reduces the likelihood of crystal formation as the urine does not sit in the bladder for so long. Some crystals and stones can be dissolved with dietary supplements alone, changing to a natural balanced wet diet can be enough to irradiate the problem. Some stones cannot be dissolved with diet alone. Other cases need medication or if they are just too large, will require surgical removal. Prescription diets are available with manipulated ingredients and urinary acidifiers. Types of crystals Struvite Magnesium Ammonium Phosphate, triple phosphate Struvite stones are one of the most common types of bladder stones found in dogs. In most cases, struvite bladder stones are caused by infection, namely Staphylococci and Proteus bacteria being the usual culprits. This infection is often contracted from the lower urinary tract. Struvite occurs in alkaline urine (above pH 7) 85% of cases are found in female dogs A meat based diet will naturally make the urine more acidic which can help Often seen alongside recurring bladder infections Supplements tend to assist in creating a healthier pH Helpful supplements – Cranberry extract (Proanthocyanidins, PACs) – proven to reduce bacteria such as E coli Howell AB. Bioactive compounds in cranberries and their role in prevention of urinary tract infections. Mol Nutr Food Res. 2007 Jun;51(6):732-7. doi: 10.1002/mnfr.200700038. PMID: 17487930. – Methionine– is an amino acid that has been proven to acidify the urine Siener R, Struwe F, Hesse A. Effect of L-Methionine on the Risk of Phosphate Stone Formation. Urology. 2016 Dec;98:39-43. doi: 10.1016/j.urology.2016.08.007. Epub 2016 Aug 9. PMID: 27521063. – N -Acetyl Glucosamine – helps bladder support, may reduce inflammation and sooth the bladder wall. Theoharides TC, Kempuraj D, Vakali S, Sant GR. Treatment of refractory interstitial cystitis/painful bladder syndrome with CystoProtek–an oral multi-agent natural supplement. Can J Urol. 2008 Dec;15(6):4410-4. PMID: 19046494. – Apple cider vinegar – is a wonderful anti microbial Yagnik D, Ward M, Shah AJ. Antibacterial apple cider vinegar eradicates methicillin resistant Staphylococcus aureus and resistant Escherichia coli. Sci Rep. 2021 Jan 20;11(1):1854. doi: 10.1038/s41598-020-78407-x. PMID: 33473148; PMCID: PMC7817673. References Bartges JW, Callens AJ. Urolithiasis. Vet Clin North Am Small Anim Pract. 2015 Jul;45(4):747-68. doi: 10.1016/j.cvsm.2015.03.001. PMID: 26002797. Palma D, Langston C, Gisselman K, McCue J. Canine struvite urolithiasis. Compend Contin Educ Vet. 2013 Aug;35(8):E1; quiz E1. PMID: 23677867. Queau Y. Nutritional Management of Urolithiasis. Vet Clin North Am Small Anim Pract. 2019 Mar;49(2):175-186. doi: 10.1016/j.cvsm.2018.10.004. Epub 2018 Dec 21. PMID: 30583809. Calcium oxalate Microscopic Calcium Oxalate crystals The second most common crystal found in dogs, is calcium oxalate. Current research indicates that urine high in calcium, citrates, oxalates and in an acidic environment, predisposes a pet to developing calcium oxalate crystals. Recent studies have shown diets that cause high urine acidity (urine pH less than 6.5) may predispose dogs to develop this type of bladder stone. These occur in neutral to acidic urine (below pH6.5-7) It is not possible to dissolve these so surgery is needed to remove stones Common in Miniature Schnauzers, Miniature Poodles, Yorkshire Terriers, Lhasa Apso, Bichon Fris and Shih Tzu) High oxalate foods to be avoided such as spinach, swiss chard some seeds legumes and berries Probiotics are found to be able to breakdown oxalate in the digestive system. A good broad-spectrum probiotic can contribute to this
Like all the systems in the body, things can and do go a little awry with urinary health. We’ve compiled 3 things to consider if your pet is facing challenges in this system. What can go wrong with my pet’s urinary system? Cats and dogs can be prone to developing urinary stones and infection. These occur when the concentration of certain minerals in your pet’s urine becomes too high (alkaline). In healthy pets, the urine pH is generally in the 6.5 to 7.0 range. If the pH is acidic (pH below 6) or alkaline (pH above 7) it may allow bacteria to thrive and for crystals or stones to form. Stones in the bladder can cause inflammation, predispose to urinary tract infections and even cause an obstruction of the urinary tract. There are different types of stone composed of different minerals and compounds. What Can I Do For My Dog’s Bladder Stones? Your pet can also suffer from bacterial infection in their urinary system, leading to discomfort in the lower urinary tract. Urinary incontinence, anatomic abnormalities and tumours are amongst other conditions that may affect the urinary tract in cats and dogs too. Female dogs and cats are more likely to suffer with UTI’s and stones often due to structure but also possible hormonal changes. This is also suggests that urinary issues may face those neutered dogs too. Signs of UTI’s, stones or other UT issues may include one or more of the following; Chronic diarrhoea, loose stools or constipation Difficult or painful urination Stooping as if to defecate Incomplete urination Urinary incontinence Darker colour urine and offensive odour Fresh blood spots in urine Bloated, tender abdomen Loss of appetite Lack of energy Crying out in pain (generally from stones) Panting Weight loss Possible Causes of UTI’s and Stones Poor commercial foods. We know fresher fed pets have a more biodiverse microbiota that creates metabolites that protect the mucosa and UT. Food allergies and sensitivities. Stress can cause digestive dysfunction, leading to inflammation of the entire body, including the UT. Hormonal changes and neutering of a cat or dog can make for concurrent issues. Endocrine issues and dysfunction tend to affect the UT. Looking at underlying issues is always helpful. Dysbiosis leads to increased intestinal permeability, loss of immune tolerance, aberrant immune responses, and specific microbiome shifts. SIBO (small intestinal bacterial overgrowth), is commonly found and highly associated with concurrent UTI’s. Parasitic infections can take hold when the GI is not functioning well and immune function becomes compromised. The urinary tract may become a weakened system because of this. Poor immunity and gut immunity can cause over-reactivity and inflammation. This can arise from birth to not being weaned effectively and even include environmental exposures (or lack thereof). Anatomical structural issues where the urethra is close to the anus, collecting bacteria leading to infection. Genetics in rare occasions can predispose a cat or dog to urinary stones. Cystinuria is a rare inherited disease that results in the formation of stones made of an amino acid called cysteine. The known gene defects responsible for cystinuria affect the kidneys and cause the kidneys to improperly excrete too much cysteine into the urine. Consistent use of antibiotics can wipe out the beneficial bacteria that protect the mucosa of the gut and UT. Adverse drug reactions or over-medication and vaccination can create a hyperactive immune state and inflammation which are implicated in UT issues and infection. Things to consider in supporting UT Health: 1) Feed A Fresh Food Diet A fresh diet rich in easily digestible proteins, beneficial fats and vegetables (fibre) can help support gut microbiota, a healthy body and a healthy UT. Home prepared, cooked or raw is the very best in this instance. The balance of calcium and phosphorus in a dicalcium phosphate form or even better from bones or bone meal is essential. Reducing oxalic vegetables and keeping an eye on high magnesium content is helpful, but a fresher diet can often negate the impact and therefore proliferation of stones and infections. Processed foods and sugars can cause systemic inflammation triggering UT inflammation. Sugar is also the food of choice for many of the less than desirable bacteria. Certain foods can often elicit an unwanted immune response, so understanding what might be causing your pet to react is essential. Elimination Diets For Dogs 2) Consider Supplements Ashwaganda is a beautiful adaptogenic herb, which does what it says on the tin. It helps the body adapt. This is worth considering if there is any element of stress influencing your dog’s UT health. Slippery elm: a beautiful insoluble fibre that tends to help regardless of the cause. It has mucilage properties where it creates a film, soothes, protects and helps to heal the entire gastric system including there productive and UT system. Deglycyrrhised liquorice: this botanical and functional herb is a demulcent (or mucilaginous, the same as slippery elm). It enhances oesophageal and digestive mucosal protection and in powder or liquid form, can help soothe the oesophageal, digestive and UT lining. DGL has been shown to create extra mucus, acting as a barrier to acid in the stomach, oesophagus, and UT. This barrier may allow damaged tissue to heal. Probiotics: the gut microbiota allows for a healthy ecology and functioning of the gut. It helps support immunity, aids the digestion of food, may outcompete pathogenic bacteria and yeast and has shown promise in reducing inflammation. For a happy gut, we need a diverse gut, and this means that certain beneficial bacteria reign. It is proven in humans that a healthy microbiota creates the necessary metabolites within the UT that protect against pathogenic bacteria too, so optimising gut health, with consideration given to probiotic usage may be of benefit. Cranberry and D Mannose: bacterial adhesion has been found to be significantly reduced after culture with urine samples obtained at 30 and 60 days, compared with results for urine samples obtained before extract administration from 12 dogs in a study for UTI’s. Oral administration of
When we understand that that the microbiome has a direct relationship with every organ in the body, why wouldn’t we wonder whether it could play a role in our dog’s bladder stones? We are somewhat lagging in canine data, but let’s take a look at the current information around urinary health and the microbiome. The Urinary System As body cells carry out metabolic activities, they consume oxygen and nutrients. During this process, waste products are made. These waste products must be eliminated from the body because if they are left to accumulate, they can become toxic. As the respiratory system eliminates carbon dioxide, the urinary system picks up the remainder of the waste products. This system consists of: Two kidneys Two ureters One urinary bladder One urethra The kidneys filter the blood of wastes and excretes them into urine. Once formed, urine passes through the ureters and is stored in the urinary bladder. It is then excreted through the urethra. The Bladder and Urine Cats and dogs can be prone to developing urinary stones and infection. These occur when the concentration of certain minerals in your pet’s urine becomes too high (alkaline). In healthy pets, the urine pH is generally in the 6.5 to 7.0 range. If the pH is acidic (pH below 6) or alkaline (pH above 7) it may allow bacteria to thrive and for crystals or stones to form. Stones in the bladder can cause inflammation, predispose to urinary tract infections, and even cause an obstruction of the urinary tract. There are several different types of stones, and they are composed of different minerals and compounds: Struvite Calcium oxalate Urate Cystine The most common causes include: Bacteria in the urinary tract Urinary pH Minerals present in the urine Genetics Bladder inflammation Struvite Stones These stones form due to excess magnesium, ammonium, and phosphorus. Normal canine urine is slightly acidic and contains waste products from metabolism. Struvite is a normal compound found in canine urine and will remain dissolved if the urine is acidic and not too concentrated. When the urine become too concentrated or alkaline, struvite crystals form. These stones tend to form because of a urinary tract infection and involves an enzyme known as urease. Urease is produced by the pathogenic bacteria and breaks down urea, which is normally found in urine. In the process, excess ammonia is produced which causes the urine to become alkaline. Excess ammonia in the urine also results in bladder inflammation, contributing to the issue. These stones are generally more common in female dogs. Kidney disease, long term use of diuretic medication and PPI’s can also result in alkaline urine, predisposing the dog to struvite stones. Calcium Oxalate Stones The current line of thinking is that urine high in calcium, citrates, or oxalates and is acidic predisposes a dog to developing calcium oxalate urinary crystals and stones. Recent studies have shown diets that cause high urine acidity (urine pH less than 6.5) may predispose dogs to develop this type of bladder stone. But, like most things, there are likely other causes of calcium oxalate bladder stones too. For example, over-usage of antibiotics may reduce numbers of the intestinal bacteria Oxalobacter formigenes whose sole nutrient is oxalate. In dogs with low populations of Oxalobacter, excess oxalate is secreted in the urine, increasing the likelihood that calcium oxalate crystals and stones can form if the urine is highly concentrated or becomes acidic. Calcium oxalate uroliths are noted more commonly in male dogs and the breeds most diagnosed with both struvite and calcium oxalate bladder stones included Shih Tzus, Miniature Schnauzer, Bichon Frise, Lhasa Apso, and Yorkshire Terrier. Urate Stones Urate stones are generally caused by a genetic condition in some dog breeds like Dalmatians, Jack Russel Terriers and Bulldogs. But they are also seen with liver disease, especially in dogs or cats with liver shunts. Urate stones are made from compounds called purines. Purines are one of the most common chemical compounds on the planet. There are both endogenous and exogenous. Exogenous purines are absorbed by the body through the foods eaten, and endogenous purines are made by the body itself. Purines and pyrimidines are the two families of nitrogenous base that make up nucleic acids – in short, they are the building blocks of DNA and RNA. Purines have a number of functions in the body: Signalling molecule Provide energy Control cell growth Part of essential coenzymes Contribute to nervous system function (including neuronal development) As you can see, purines perform many important functions in the cell, and so the balance between its synthesis and degradation is essential. When purines are catabolised, the result is uric acid. In all other mammals, apart from humans and Dalmatians, uric acid is then converted to allantoin, which is a very soluble excretion product. For us humans and those unlucky dogs, we excrete uric acid through the kidneys (with some excreted through the gastrointestinal tract). Uric acid is suggested to behave as a potent antioxidant. It is also thought to maintain blood pressure under low salt conditions and has been seen to function as an anti-inflammatory in certain diseases, but when levels become too high, in a condition known as hyperuricemia, problems can ensue. In humans, this can result in diseases such as kidney stones and gout and may cause hypertension. In those unlucky dogs, high uric acid levels result in bladder stones. For this reason, a low purine diet is often suggested for those pets suffering urate stones. Uric Acid and The Microbiota It is thought that around 1/3 of uric acid excretion occurs via the intestinal pathway. When uric acid is excreted into the gut, it is then metabolised by resident bacteria. What is interesting is that when kidney function is impaired, uric acid will mainly be eliminated by the intestine as compensation. It’s not therefore entirely surprising that there is a correlation between efficient uric acid metabolism and certain strains of bacteria found in the gut. Human studies have found a significantly
Bladder stones are exactly that, stones that form in your pet’s bladder. The more technical term is urolithiasis, which denotes the presence of uroliths in the urinary tract. These stones can develop over weeks or months, and a common question we are asked here at My Pet Nutritionist is whether dietary changes can make a difference. We thought we’d focus on what bladder stones are, the different types and whether in fact dietary management is something to consider. What Are Bladder Stones? Cats and dogs can be prone to developing urinary stones and infection. These occur when the concentration of certain minerals in your pet’s urine becomes too high (alkaline). In healthy pets, the urine pH is generally in the 6.5 to 7.0 range. If the pH is acidic (pH below 6) or alkaline (pH above 7) it may allow bacteria to thrive and for crystals or stones to form. Stones in the bladder can cause inflammation, predispose to urinary tract infections, and even cause an obstruction of the urinary tract. There are several different types of stones, and they are composed of different minerals and compounds: Struvite Calcium oxalate Urate Cystine The most common causes include: Bacteria in the urinary tract Urinary pH Minerals present in the urine Genetics Bladder inflammation Struvite Stones These stones form due to excess magnesium, ammonium and phosphorus. Normal canine urine is slightly acidic and contains waste products from metabolism. Struvite is a normal compound found in canine urine and will remain dissolved as long as the urine is acid and not too concentrated. When the urine become too concentrated or alkaline, struvite crystals form. These stones tend to form as a result of a urinary tract infection and involves an enzyme known as urease. Urease is produced by the pathogenic bacteria and breaks down urea, which is normally found in urine. In the process, excess ammonia is produced which causes the urine to become alkaline. Excess ammonia in the urine also results in bladder inflammation, contributing to the issue. These stones are generally more common in female dogs. Kidney disease, long term use of diuretic medication and PPI’s can also result in alkaline urine, predisposing the dog to struvite stones. Calcium Oxalate Stones The current line of thinking is that urine high in calcium, citrates, or oxalates and is acidic predisposes a dog to developing calcium oxalate urinary crystals and stones. Recent studies have shown diets that cause high urine acidity (urine pH less than 6.5) may predispose dogs to develop this type of bladder stone. But, like most things, there are likely other causes of calcium oxalate bladder stones too. For example, over-usage of antibiotics may reduce numbers of the intestinal bacteria Oxalobacter formigenes whose sole nutrient is oxalate. In dogs with low populations of Oxalobacter, excess oxalate is secreted in the urine, increasing the likelihood that calcium oxalate crystals and stones can form if the urine is highly concentrated or becomes acidic. Calcium oxalate uroliths are noted more commonly in male dogs and the breeds most diagnosed with both struvite and calcium oxalate bladder stones included Shih Tzus, Miniature Schnauzer, Bichon Frise, Lhasa Apso, and Yorkshire Terrier. Urate Stones Urate stones are generally caused by a genetic condition in some dog breeds like Dalmatians, Jack Russel Terriers and Bulldogs. But they are also seen with liver disease, especially in dogs or cats with liver shunts. Urate stones are made from compounds called purines. Purines are one of the most common chemical compounds on the planet. There are both endogenous and exogenous. Exogenous purines are absorbed by the body through the foods eaten, and endogenous purines are made by the body itself. Purines and pyrimidines are the two families of nitrogenous base that make up nucleic acids – in short, they are the building blocks of DNA and RNA. Purines have a number of functions in the body: Signalling molecule Provide energy Control cell growth Part of essential coenzymes Contribute to nervous system function (including neuronal development) As you can see, purines perform many important functions in the cell, and so the balance between its synthesis and degradation is essential. When purines are catabolised, the result is uric acid. In all other mammals, apart from humans and Dalmatians, uric acid is then converted to allantoin, which is a very soluble excretion product. For us humans and those unlucky dogs, we excrete uric acid through the kidneys (with some excreted through the gastrointestinal tract). Uric acid is suggested to behave as a potent antioxidant. It is also thought to maintain blood pressure under low salt conditions and has been seen to function as an anti-inflammatory in certain diseases, but when levels become too high, in a condition known as hyperuricemia, problems can ensue. In humans, this can result in diseases such as kidney stones and gout and may cause hypertension. In those unlucky dogs, high uric acid levels result in bladder stones. For this reason, a low purine diet is often suggested for those pets suffering urate stones. Foods High in Purines Organs/offal (brain, heart, liver, kidneys) Wild or Farmed Game Herring Mackerel Trout Sardines Sprats Legumes (such as kidney beans, lentils, chickpeas) Foods Lower in Purines Green leafy vegetables (except spinach) Eggs Nuts Muscle meats from chicken, turkey, lamb, pork, beef, Fruits If urate stones are associated with liver disease, you may want to learn more about liver disease in our other blogs. Liver Disease Liver Shunts Foods to Feed in Liver Disease Cystine Stones This is rarer in the dog, but it can occur. This is when bladder stones are composed of cystine crystals, and it is largely genetic. They are more commonly found in the following breeds: Mastiff Saluki Puli Basset Hound Dachshunds Findings Here Cystine is an amino acid that is freely filtered in urine and almost completely reabsorbed by the kidney tubules. Sadly, an inborn error of metabolism causes high concentrations of urinary cystine in those affected dogs. These stones also form in acidic environments and in
One of the common issues we are asked about here at My Pet Nutritionist is kidney and urinary health. Our blog on urinary tract issues can be found. Here But we thought we’d go back to basics and look at the role of the urinary system and why supporting its function is important to overall health. The Urinary System As body cells carry out metabolic activities, they consume oxygen and nutrients. During this process, waste products are made. These waste products must be eliminated from the body because if they are left to accumulate, they can become toxic. As the respiratory system eliminates carbon dioxide, the urinary system picks up the remainder of the waste products. But this is not the only function of the urinary system, so let’s take a look. This system consists of: Two ureters, One urinary bladder, One urethra. The kidneys filter the blood of wastes and excretes them into urine. Once formed, urine passes through the ureters and is stored in the urinary bladder. It is then excreted through the urethra. Functions of the Kidneys Excretion of wastes: By forming urine, the kidneys help excrete waste from the body. Some of these are a result of metabolic processes, like urea and ammonia, which is as a result of the deamination of amino acids. It also includes creatinine which is a result of breaking down creatine phosphate. Finally, it includes uric acid from the catabolism of nucleic acids. These compounds are all known as nitrogenous wastes as they are wastes that contain nitrogen. The remainder of wastes are foreign substances that have entered the body, like medications and environmental toxins. Regulation of blood composition: The kidneys help regulate the blood levels of several ions including sodium, potassium, calcium, chloride, and phosphate. This is achieved by controlling the excretion of said ions into urine. Regulation of blood pH Regulation of blood volume: The kidneys adjust blood volume by conserving or eliminating water in the urine. An increase in blood volume increases blood pressure and a decrease in blood volume decreases blood pressure. Regulation of blood pressure: The kidneys secrete the enzyme renin which activates the renin-angiotensin-aldosterone pathway. Increased renin increases blood pressure. Production of hormones: The kidneys produce two hormones, calcitriol helps regulate calcium homeostasis and erythropoietin stimulates the production of red blood cells. Regulation of blood glucose level: Live the liver, the kidneys can use certain amino acids like glutamine in gluconeogenesis, which is the production of new glucose molecules. The Contributions of The Urinary System for All Body Systems Skeletal System The kidneys help adjust levels of blood calcium and phosphates needed for building extracellular bone matrix. Muscular System The kidneys help adjust calcium levels for contraction of muscle. Nervous System Through the process of gluconeogenesis, the kidneys provide glucose for ATP production in neurons, especially during fasting or starvation. Endocrine System The kidneys participate in the synthesis of calcitriol, the active form of Vitamin D. They also release erythropoietin which is the hormone that stimulates the production of red blood cells. Cardiovascular System As noted previously, the kidneys play a key role in the regulation of blood volume, pressure and composition. Lymphatic System and Immune Function By increasing or decreasing their reabsorption of water filtered from blood, kidneys help adjust volume of interstitial fluid and lymph. Urine also flushes microbes out of the urethra. Respiratory System The kidneys and lungs cooperate by adjusting pH of body fluids. Digestive System As we have mentioned, the kidneys synthesise calcitriol which is the active form of vitamin D. This is necessary for the absorption of dietary calcium. Evaluation of Kidney Function As you have gathered, the kidneys play a pretty important role in the body, and there are a number of ways we check how well they are doing it. The blood urea nitrogen test measures the amount of urea in a sample of blood. Urea is a waste product of the breakdown of protein. When glomerular filtration rate (how much blood is filtered) decreases severely in the case of renal disease or obstruction in the urinary tract, BUN rises steeply. The other test that is often used is to measure plasma creatinine. This is the result of the catabolism of creatine phosphate in skeletal muscle. Normally the creatinine levels remain steady, because the rate of excretion in the urine remains equal to its discharge from muscle, but high creatinine levels can indicate poor renal function. Renal plasma clearance is a test which establishes how effective the kidneys are at removing a given substance from blood plasma. Urine Water accounts for around 95% of the total volume of urine. The remaining 5% consists of: Electrolytes Solutes derived from cellular metabolism Exogenous compounds (like medications) Typical constitutes of urine include: Filtered and secreted electrolytes Urea Creatinine Uric acid Urobilinogen Small amounts of fatty acids, pigments, enzymes, and hormones If disease alters body metabolism or kidney function, traces of substances not normally present may appear in the urine, or normal constituents may appear in abnormal amounts. For example: Albumin: a normal constituent of plasma, it usually appears in small amounts in urine. The presence of excess albumin indicates increased permeability of kidney filtration membranes due to injury or disease, increased blood pressure, or irritation of kidney cells by substances like bacterial toxins or heavy metals. Glucose: presence in the urine usually indicates diabetes but it can also be a result of stress (causing excess epinephrine secretion – epinephrine stimulates the breakdown of glycogen and liberation of glucose from the liver). Red blood cells: this usually indicates a pathological condition. One cause is acute inflammation or urinary organs due to disease or irritation from kidney stones. Ketone bodies: high levels of ketone bodies in urine may indicate diabetes, anorexia, or starvation. Bilirubin: when red blood cells are destroyed by macrophages, the globin portion of haemoglobin is split off and haem is converted to biliverdin, this is then converted to bilirubin which gives bile its pigmentation. Microbes: these will be
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
If you have been following any nutrition nerds (including us here at My Pet Nutritionist) then you will have likely come across the terms macro and micronutrients. We tend to reference them more commonly in the human realms, but that doesn’t mean that they don’t also apply to our canine companions (and feline for that matter). When we mention macronutrients we are referencing those needed in larger amounts in the body and they encompass protein, fat and carbohydrates. When we consider micronutrients we are looking at vitamins and minerals. Despite them being needed in micro amounts, they are still biologically necessary to all functions in the body. So, let’s take a look at minerals in a little more detail and see why your dog needs them. What is a Mineral? A mineral is a naturally occurring inorganic solid, with a definite chemical composition, and an ordered atomic arrangement. What on earth does this mean we hear you wonder? Well, let’s break it down. Minerals are naturally occurring, meaning they are not made by humans. They are inorganic, meaning they have never been alive. They are solid, meaning they are not liquid or gas. Each of them has a unique structure and arrangement which is how we know what they are. For the dog we are interested in 17 essential minerals. We have macrominerals which are needed in larger amounts and trace minerals which are needed in smaller amounts. Macrominerals Calcium You’ll likely be familiar with calcium as you were probably told to drink your milk so you would have strong teeth and bones. Calcium is the main structural component of skeleton and teeth, but it also plays a role in blood clotting. In addition, it is involved in the intracellular messaging triggering the contraction of muscle fibres. Calcium also plays a role in fat oxidation and it carries ATP (energy) with magnesium. There is an increased risk of deficiency in: Diets containing large quantities of phosphorus and sodium. Fat malabsorption (fat binds calcium, reducing absorption). Vitamin D deficiency. Diets containing large quantities of oxalates. Signs of Deficiency: Poor bone mineralisation, Muscle cramping and spasm, Increased irritability of nerve cells, Abnormal blood clotting and increased bleeding after trauma. Chloride Chloride is one of the most important electrolytes found in the blood. It plays a key role in controlling the amount of water and type of compounds that go in and out of cells. It therefore plays a crucial role in homeostasis. Chloride also contributes to muscle function and this includes the heart. This mineral helps red blood cells exchange oxygen and carbon dioxide too! Lastly, chloride supports digestive processes through its role in the production and release of hydrochloric acid in the stomach, and as we know, without this, foods won’t be properly digested and subsequently absorbed. Low levels of chloride are usually found alongside existing health issues which result in electrolyte imbalances. Sources of Chloride: Himalayan Salt Seaweed Magnesium Here at My Pet Nutritionist, we have a thing about Magnesium, for good reason. If you want to know more about this trusty mineral, then check out our full blog here: Why Is Magnesium So Important to Your Pet But the one often forgotten role of magnesium is the part it plays in energy, so we’ll do a recap. The bottom line is that insufficient micronutrient intake results in poor ATP production in the mitochondria. Remember that ATP is the currency of energy and the mitochondria is the powerplant of the cell, where it all happens. Magnesium and copper are star minerals for making ATP and without enough ATP or energy, the body hasn’t got enough resources to do what it needs to! In addition, a deficiency in magnesium can lead to mitochondrial damage. Signs and Symptoms of Deficiency: Muscle cramps and spasms Anorexia, nausea, vomiting Arrythmias Sodium and water retention Impaired action of vitamin D Increased Risk of Deficiency: Diets emphasizing processed foods and refined grains (largely nutrient deplete) Strenuous training Periods of rapid growth Intestinal malabsorption Medications (diuretics, steroids, laxatives) As a note, magnesium deficiency has also been linked to increased inflammatory cytokines, so this is a consideration to make in any chronic inflammatory condition. Findings Here Phosphorus Phosphorus in mainly used for the growth and repair of body tissues – it is a component part of bones, teeth, RNA and DNA. In the form of phospholipids, phosphorus is also a component of cell membrane structure and of the body’s key energy source, ATP. Many proteins and sugars in the body are phosphorylated. In addition, phosphorus plays key roles in regulation of gene transcription, activation of enzymes, maintenance of normal pH in extracellular fluid, and intracellular energy storage. A range of foods contain phosphorus, mainly in the form of phosphates and phosphate esters. Phosphorus in seeds for example, is in the form of phytic acid, the storage form of phosphorus. Because many species intestines lack the phytase enzyme, much phosphorus in this form is unavailable for absorption. Low phosphorus levels in the body can include anorexia, anaemia, proximal muscle weakness, skeletal effects (bone pain, rickets, and osteomalacia), increased infection risk, ataxia, and confusion. But in most cases, hypophosphatemia (low phosphorus) is caused by existing health conditions, such as hyperparathyroidism, kidney disorders, and diabetic ketoacidosis. In cases of chronic kidney disease, their ability to excrete phosphorus becomes compromised. This is why low phosphorus diets are often recommended. Kidney Disease Potassium Another electrolyte, potassium is also involved in energy production and membrane excitability and transport. Throughout the body there are a number of functions that are potassium dependent. If potassium is deficient, these enzymes or proteins are unable to carry out their job as they should. For example, one heat shock cognate protein, involved in protein folding, autophagy, apoptosis and cell stability requires potassium to carry out these functions. In a deficit, cell senescence results, along with DNA damage, carcinogenesis, and neurodegeneration. Findings Here The bottom line is that potassium helps nerves and muscles to function correctly, it maintains a
Everyday, ours and our pet’s bodies are exposed to toxins. They are produced internally in the body, like lactic acid and consist of waste products from gut microbes, hormones, and neurotransmitters. But the largest threat is possibly those external toxins, like air pollution, chemicals from cleaning products and volatile organic compounds from the plug-in air diffuser in your lounge. Here at My Pet Nutritionists, when considering your pet’s well-being, detoxification is largely looked at as part of the health picture. 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. A toxin is defined as any substance that must be neutralised and eliminated to avoid its promotion of ill-health if left to accumulate. What surprises most people is that the body produces waste products every second of every day in the form of used hormones, neurotransmitters, or oxidised lipids. For this reason, even if we manage ours and our pet’s environments well, we still need to support our detoxification system, simply to eliminate the exhaust fumes of daily life. So, what is detoxification? 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 will 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 penetration, they also express a range of enzymes which are essential in sweeping toxins away. 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 dog’s toxic load, all three phases need to be working optimally. Liver Guard Phase I PhaseI is primarily undertaken by a superfamily of enzymes and they are predominantly concentrated in the liver (but are found in the oral and nasal cavity). t also includes enzymes like MAOs or monoamine oxidases to deal with neurotransmitters (those chemical messengers involved in mood and behaviour ) 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 (there is also evidence of poor antioxidant capacity in obesity). These enzymes are also highly polymorphic – which means they are prone to altered gene expression. If you would like to know how gene expression can alter detoxification in the cat, then check out our blog here. But, whether the expression starts to cause problems can often depend on the nature and exposure to toxins. Once toxins have been passed through phase I, they are not finished with. Intermediate metabolites are produced, and they sit in the body. t’s almost like putting your rubbish in the outside bin, but missing collection day. The rubbish remains. Welcome to phase II Within phase II there are number of pathways and they are all responsible for detoxifying different compounds. Methylation The process of methylation deals with heavy metals, plastics, medications, mould,histamine, hormones, and neurotransmitters. This process requires nutrients like folate, vitamin B6, zinc and magnesium. Many environmental factors can limit methylation capacity including low dietary intake of co-factors, use of proton pump inhibitor medication, stress, use of anti-depressant medication, gut dysbiosis, high exposure to toxins and a high histamine diet. This can then become more of an issue in those with genetic SNPs in the genes that code for the enzymes involved. Poor methylation can also impair bile synthesis, which then impacts on cholesterol maintenance and glucose metabolism. Sulphation The process of sulphation deals with heavy metals, heavy smoke, hormones, neurotransmitters, plastics, phenols, and medications including antibiotics. Efficient sulphation requires an adequate supply of sulphur (included in cruciferous vegetables for example), but also iron, molybdenum and vitamin B12. Deficiency in any of these can result in an accumulation of sulphites and then an increased sensitivity to sulphite containing foods or supplements (MSM for example). Since this pathway modulates catecholamine levels, poor function can result in higher circulating levels too. Glutathione conjugation This deals with heavy metals, plastics, mycotoxins, 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. Steady supply of the enzymes in this pathway relies on vitamin B2. But what is also of interest is that the more the glutathione pathway becomes overloaded with long-term paracetamol use, the more depleted glutathione stores become, which places increased pressures on other Phase II pathways and Phase I processes. Low selenium also contributes to poorer enzyme function here. Glucuronidation 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 in this process include vitamin B3, B6 and iron. The glucuronidation pathway is particularly affected by digestive health. Anything that promotes gut dysbiosis, like antibiotics, high sugar intake or the use of certain medications which later digestive function can result in toxins being recirculated throughout the body. This then results in increased oxidative stress, which has its own ramifications throughout the body. Acetylation Acetylation supports the detoxification of smoke, halides, tyramine, caffeine, neurotransmitters, histamine, and
It always takes a couple of years for data to start filtering through, but in 2018, a survey of veterinary professionals believed that rates of obesity are increasing year on year. It is thought that 51% of dogs and 44% of cats in the UK are overweight. That is just over half of the population of dogs and nearly half of the population of cats. These numbers are up on the last data sourced in 2015. 100% of veterinary professionals are concerned about the prevalence of obesity and the health issues it can lead to. In the words of James Smith PT, we’d love to tell you it’s as simple as a calorie deficit, but here at My Pet Nutritionist, we know that obesity is in fact a multifactorial condition, which can make it a hard nut to crack. But we also know that the health of your pet depends on it. So, we’re not about to grab a hammer, instead we’re going to take a look around the cookware store and find the right nutcracker to do the job. Fancy a trip? The Health Issues Associated with Obesity: Being overweight increases the risk factors for developing: Cancer Diabetes Heart disease Osteoarthritis and degeneration of joints Urinary bladder stones Surgery complications Respiratory difficulties Kidney disease All things considered, its easy to see why obesity significantly reduces lifespan and why it is something that really needs to be addressed. What is obesity? 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. All energy in the body is produced by the breakdown of ATP, adenosine triphosphate. ATP is found in all cells in all the body, but as it is a large molecule, not so much can be stored. In nearly every living thing, this energy comes from the metabolism of glucose. There are three relevant energy systems. 1. ATP-P This is where the body uses all the ATP it has stored in its cells. This is the simplest energy production process; and if we were to consider it in human terms, this is the system that your 100m sprint would utilise. 2. Glycolytic System This system runs on glycogen, which is stored glucose. In human terms, this system provides moderate power and moderate duration. Both the ATP-PC and Glycolytic system are anaerobic, meaning they don’t require oxygen to produce ATP. 3. Oxidative Syste This system, as its name suggests does involve the use of oxygen to product ATP. This system cannot produce energy as quickly as the other two, but it can produce it continually and for a longer duration. This system can use stored carbohydrates and fats for fuel. In human terms, this would be the system that the marathon runner would access! So, in short, glucose is used as energy, but unused glucose can be converted to glycogen to be stored in the liver and muscles. If there is still leftover, then it is converted into fatty acids and stored in adipose tissue. This makes evolutionary sense; there would be a reserve during periods of low food availability. However, as you have noticed, fat too can be used as an energy source, and protein can be broken down into amino acids and then converted to glucose in a process known as gluconeogenesis. This is where the calorie in, calorie out idea comes from. An overabundance of any of the three macronutrients, can be converted into fat for later use. And the idea that obesity comes from reduced activity comes from the reasoning that those reserves aren’t actually used. On a simplistic level, this makes absolute sense and for the pet who is starting to look a little more round than usual, a simple reduction to their daily intake or a longer walk, may just tuck that waist in a little more. But there are many more factors at play here. Fat is the New Norm 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. Interestingly, a recent report from the NHS in the UK identified that 67% of men and 60% women were overweight or obese. 20% of Year 6 children were also classified as obese. Findings here Whilst we acknowledge there are faults in BMI scores, it still highlights a valid point. Sadly, pet obesity has many parallels with human obesity and according to the NHS, fat is the new norm for humans. As we know, we learn from experience and so, if we are consistently exposed to something, it becomes accepted. If we are consistently exposed to round pets, without a waistline, do we accept it? But, our pets need a waistline. They should tuck-in behind their ribs, and underneath. Whilst you shouldn’t be able to see their ribs, you should be able to feel them. They should not look rectangular from any angle, side or above. What treats are you offering your pet? Whilst for us humans, a decadent chocolate pot may be a weekend treat, dog treats have somewhat lost their novelty. Treats can be a useful resource during training, and in some cases, high value are necessary, but for some, treats are used as a way to prevent feelings of guilt when pets are being left home alone. Depending on how many times you leave the house, these can soon add up! 1. Table scrap We’ve all been there, those eyes looking up at you whilst you’re eating. Whilst that cubic inch of cheese only warrants 68 calories of your daily 2500 (call it 3%), for your 9kg Scottie Dog, that’s nearly 20% of their daily calorie allowance. If begging at the table is an issue, it is possible to remove the pets to
