Navigating a diagnosis of bladder stones or crystals in dogs can feel like an overwhelming journey. While information exists for various stone types, this guide specifically focuses on Struvite Stones, a common concern for many pet owners. Understanding their formation, recognizing symptoms, and implementing effective management strategies are crucial for your dog’s well-being.
What are Struvite Crystals and Stones?
Struvite crystals are the most prevalent type found in dogs. They become problematic when they combine with Urease, an enzyme produced by bacteria, leading to the formation of struvite stones. While the presence of struvite crystals alone may not cause significant worry, their transformation into stones necessitates veterinary intervention. Struvite stones can also develop due to infections from bacteria such as Proteus and Staphylococci strains.
Chemically, Struvite Stones are known as Magnesium-ammonium-phosphate or triple phosphate. Worryingly, female dogs are at a significantly higher risk, accounting for a staggering 85% of cases. Dogs that frequently suffer from urinary tract infections (UTIs) are also more predisposed to developing struvite stones.
Symptoms of Struvite Stones in Dogs
If your dog develops struvite stones, you might observe a range of symptoms, including:
- Blood in urine: This can be a visible sign of irritation or damage within the urinary tract.
- ‘Downward dog’ position: This posture may indicate abdominal pain.
- Frequent urination: Your dog may feel a constant urge to urinate, even if little urine is produced.
- Urinary incontinence or urinating in unusual places: This can signal a loss of bladder control due to discomfort or urgency.
- Difficulty urinating: Straining or crying during urination is a clear sign of obstruction or pain.
- Regular licking of the genitals: This is often a self-soothing behavior due to irritation or discomfort.
- Increased thirst: Some dogs may drink more as a response to the condition or associated symptoms.
- Nausea: In more severe cases, nausea can occur.
How Struvite Stones Form
Struvite stones thrive in an alkaline environment. A healthy pH for canine urine is typically between 6.5 and 7, which is neutral to slightly acidic. Urine with a pH above 7 is considered alkaline. When a bacterial infection occurs in the bladder, it produces ammonia, which increases the urine’s alkalinity. This alkaline environment is conducive to the formation of struvite stones.
Diagnosing Struvite Stones
X-rays are often the easiest method for diagnosing struvite stones, as they are radiodense and usually show up clearly. However, in some instances, other body parts may obstruct a clear image. If X-rays are not definitive, a veterinarian may use ultrasound on the bladder area. Sometimes, a colored liquid is administered to the dog before imaging to help visualize the stones.
A crucial accompanying diagnostic step is urinalysis. Urine samples are examined for the presence of bacteria or crystals, which can help identify the type of stone, as imaging alone can sometimes be ambiguous. For a definitive diagnosis, a sample of the stone, if obtainable, can be analyzed by a veterinary laboratory.
Veterinary Treatment Options
Veterinarians have several options for treating struvite stones. Surgical removal, known as Ureteroscopy, involves inserting a small instrument into the bladder and ureter to push the stone out. Alternatively, for larger stones causing blockages, a more traditional surgical approach may be necessary to remove them directly.
A less invasive, non-surgical option is urohydropulsion. This procedure is generally more successful in medium to large dogs. It involves placing two catheters: one in the urethra and another in the urethral lumen. Digital rectal pressure is applied to the urethra to create pressure and a tight seal. Saline water is then flushed through the catheters while the bladder is massaged, flushing out smaller stones. While this method requires anesthesia, it’s preferred for smaller stones due to its minimally invasive nature.
Veterinarians may also recommend dietary changes. However, it’s important to be aware that some prescription dry foods may not be ideal, as they often have low meat content and moisture, both vital for dogs with bladder stones.
Supporting Your Dog and Preventing Struvite Stone Recurrence
To support your dog and minimize the risk of Struvite Stones recurring, focus on diet and appropriate supplementation.
Diet
A high-moisture diet is essential for dogs with any type of bladder stone. Fresh feeding, whether raw or gently cooked, naturally provides the necessary moisture. You can further enhance moisture content by adding extra water to your dog’s food. The high meat content in fresh diets is also beneficial, as meat helps promote a more acidic environment in the bladder, which is unfavorable for struvite stone formation.
Ingredients that can help promote an acidic environment include:
- Chicken
- Pork
- Beef
- Eggs
- Fish
- Venison
Conversely, it’s advisable to limit or avoid more alkaline foods such as broccoli, carrot, cucumber, pumpkin, kale, sweet potato, apple, banana, and cabbage. For dogs with struvite stones, consider balanced fresh recipes like Low Fat Fish or Low Fat Venison.
Supplements
Several supplements can be highly beneficial in managing Struvite Stones:
- Gut Health Supplements: A healthy gut microbiome plays a significant role. When urea is excreted into the gut, it’s broken down by bacteria. An imbalance can lead to insufficient breakdown of urea, contributing to an alkaline environment. Supplements like Gut Guardian, containing mucilage herbs and soil-based probiotics, can support gut healing and a healthy microbiome.
- Apple Cider Vinegar: The ‘mother’ in raw apple cider vinegar can help acidify the urinary tract and possesses antimicrobial properties.
- Cranberry Extract: Rich in proanthocyanidins, it can help reduce bacteria that may contribute to struvite stone formation.
- Methionine: This amino acid is a potent acidifier, actively involved in acidifying the urinary tract.
- N-Acetyl Glucosamine: This may help reduce inflammation in the urinary tract, thereby supporting overall bladder health.
- Herbal Support: Certain herbs like nettle, plantain leaf, and cleavers are believed to aid in the prevention of struvite stones and support general urinary and bladder health.
If your dog has been diagnosed with Struvite Stones, understanding these aspects is key to managing their condition. For recurring issues, consulting with a veterinary nutritionist or your veterinarian is highly recommended to develop a tailored management plan.