Bladder Stones in Dogs: A Guide to Dietary Support

Like humans, dogs can be vulnerable to urinary issues, which can stem from bacterial infections, crystals or more seriously bladder stones which are not always straight forward to diagnose.

Alison Frost, canine nutritionist at ProDog Raw, leverages decades of experience in natural dog nutrition coupled with industry-leading qualifications in canine nutrition to offer insights into supporting common health conditions through a natural diet. In this article, Alison delves into the topic of bladder stones, providing an overview of what bladder stones are, what causes them, and how you can help your dog avoid or improve them through species-appropriate nutrition.

Bladder stones in dogs are a product of crystals (formed by mineral salts) excreted into the urine via the kidneys. There are at least 5 types of crystals in dogs which can attach to each other to form stones. These are the most common:

• Struvite — Most common type and mainly found in female dogs, dogs on processed food diets, and dogs with untreated urinary tract infections (UTIs)
• Urate — More common in breeds such as Dalmatians and Bulldogs or dogs with liver shunts (due to not being able to process purines) 
• Cysteine — More common in bull breeds due to a genetic defect that prevents reabsorption of cysteine (amino acid) from the kidneys, causing build-up in the urine
• Calcium oxalate — A result of oxalates in the urine binding to calcium to form stones. More common in smaller breeds like Bichons and Yorkies 
• Silica — Often a result of silica in drinking water, as well as certain diets

Diet can make a difference

The quality of a dog’s diet speaks volumes about their overall health. When their diet is not biologically suited to their nutritional needs, their health can suffer as a result. An example of this is when dogs are fed a kibble-based diet, which lacks moisture and is more likely to cause dehydration, resulting in more saturated urine [3].

This is one reason that bladder stones in dogs can be correlated with feeding kibble diets (especially in cases involving Struvite stones), and why I recommend feeding a fresh, whole food diet: Any fresh, moisture rich, whole food diet can be tweaked to help manage bladder stones of all kinds, to help prevent recurrence.  

Raw feeding principles

The principles of raw feeding for dogs are relatively simple: feed dogs fresh, whole foods that they would naturally eat in the wild. The basic formula for a raw, species-appropriate diet for most dogs includes high-quality animal proteins (such as muscle meats and fats), organ meats, bones, and small amounts of healthy plant fibre from fruits and vegetables. This combination of foods mimics the instinctual canine diet, and provides a host of health benefits that dogs can’t access through eating processed food [5].

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Raw feeding benefits for dogs with bladder stones

All dogs benefit from a nutritionally sound, biologically appropriate raw food diet and raw feeding for dog bladder health is no exception; there just may be some tweaks required depending on the type. Here are some of the ways raw feeding can help to minimise /prevent many canine urinary problems:

• High moisture content helps to keep dogs adequately hydrated and prevents excess mineral content from forming in the urine
• Promotes a balanced acidic urine pH *
• Provides easy-assimilated nutrients for bladder and general health
• Improves gut health, leading to improved general health
• Boosts immunity and resistance to germs/bacteria

Note: *Acidity is important for Struvite stones and most bacterial infections, but please seek advice from a canine nutritionist or holistic vet if your dog is prone to Cysteine stones or other types that require a more alkaline environment

Dogs are carnivores, and as such a dog’s bladder health, as well as overall health, benefits from eating a raw, species-appropriate diet. 

Discover more of the benefits of raw food for dogs in our article.

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A healthy raw fed dog’s urine PH is usually on the slightly acidic side of neutral (between 6-7.5). When urine PH goes below or above this, this is when stones can form. Processed dried kibble diets tend to raise urine PH levels and predispose your dog to certain crystals and bacterial infections. Switching to meat based diet is advised, but once the type of stones/ crystals have been diagnosed there maybe some specific ingredient tweaks required to minimise a recurrence of bladder stones in dogs as follows:

Struvite stones 

Are the most common type of crystals and stones in dogs, and mainly affect females. Reduction or prevention is achieved by creating a more acidic internal environment and dietary modifications as follows:

• Feeding a fresh meat based diet to promote acidity
• The addition of raw, unpasteurised apple cider vinegar to food or water
• Adding fluids for less saturated urine 
• The addition of Bladder support supplements, such as cranberry and D Mannose
  

Oxalate stones 

The second most common form of bladder stones. To manage oxalate stones, it is important to keep urine pH more alkaline and reduce high oxalate foods in the diet. 

More alkaline/neutral foods are recommended, such as:

• Beef 
• Chicken 
• Turkey
• Eggs 
• Fish

Avoid high oxalate foods such as:

• Legumes, lentils, grains (prevalent in dried kibble) 
• Wheat 
• Spinach and dark leafy greens
• Nuts, seeds and strawberries/ blackberries
  

In addition, research has shown that a good quality probiotic containing lactobacillus and bifidobacterium species, has the ability to metabolise oxalates and prevent crystal and stone formation. Adding probiotics to your dog’s diet will also support a healthy gut environment and overall wellbeing.

Urate stones 

Usually form in Dalmatians, due to a genetic issue with breaking down and utilising uric acid in the diet. Uric acid forms when purines are broken down in the digestive system, so feeding low purine foods is advised for these types of stones. To discover more about the recommended diet for Dalmatians read our feeding guide.

However, if urate stones are present in a non Dalmatian breed, then you should consult your vet to discuss testing for liver shunt.  

For urate stones, feed lower purine foods such as:

• Muscle meats from chicken, turkey, pork and beef
• Tripe (raw green) 
• Leafy green vegetables (excluding spinach)
• Dairy products such as plain yoghurt, kefir, or low-fat cottage cheese
• Nuts, excluding Macadamia nuts (these are toxic to dogs)
• Eggs
• Fruits

Avoid high purine foods such as:

• Offal (organ meats)
• Game meats (venison in small amounts is generally ok) 
• Goose meat/products
• Brewer’s yeast
• Oily fish such as mackerel, sardines, or herring

Cysteine stones 

Are much rarer and form in acidic urine. Cysteine stones can arise from a genetic abnormality and mainly affect males. Dietary tweaks are recommended as follows: 

• Low acidity, lower protein, high moisture foods
• Modified raw meat diet, alongside plenty of vegetables to promote a more alkaline environment
• Increased Alpha Linoleic Acid (omega 3) found in leafy greens, helps to inhibit cysteine formation.
  

As Cysteine, Oxalate and Silica stones can be more complex to treat, I highly recommend enlisting the help of a qualified canine nutritionist or holistic vet to formulate a diet plan.

Enlist the help of experts for optimal results

It can be scary when our canine family members face health challenges, and we’re unsure of how to help them. Thankfully, there are experts ready and willing to help your dog get back to their old self. 

Traditional/holistic veterinarians, certified canine nutritionists, and even alternative health practitioners are now available for dogs, to assist with canine urinary problems as well as other health concerns. 

Enlisting the help of such experts will provide you with the answers you need to help your canine friend return to their healthy, happy ways sooner than later. If you’re unsure where to look, our list of Vets That Support Raw Feeding in the UK is a great place to start.

Improving bladder stones in dogs, naturally

Bladder stones in dogs can be tricky to tackle, but there are plenty of ways you can help your dog naturally. From fresh, whole foods to adequate hydration and bladder support supplements, helping your dog to live their best life is more than possible.

Our raw food for dogs is designed to promote optimal health and wellness in dogs through species-appropriate nutrition. Talking to a trusted canine health expert will help you along the way, and our expert feeding advisors are always available to answer your questions or queries.