Can Kidney Stones In Dogs Be Treated Without Surgery?

Kidney Stones in Dogs: Causes, Symptoms, Treatment, and Nutritional Advice. Kidney stones, also known as nephroliths, are solid mineral deposits that form in a dog’s kidneys. While relatively uncommon compared to urinary bladder stones, kidney stones can cause discomfort, urinary issues, and, in severe cases, kidney damage. Understanding the causes, symptoms, treatment options, and dietary considerations for dogs with kidney stones can help pet owners manage this condition effectively.

Causes of Kidney Stones in Dogs

Several factors contribute to the formation of kidney stones in dogs, including:

Dietary Imbalances – An excess of minerals such as calcium, phosphorus, or oxalates in the diet can lead to kidney stone formation.

Genetics – Certain breeds, such as Dalmatians, Miniature Schnauzers, and Lhasa Apsos, are genetically predisposed to developing kidney stones.

Urinary Tract Infections (UTIs) – Chronic UTIs can alter the pH of urine and encourage stone formation.

Dehydration – Insufficient water intake leads to concentrated urine, increasing the risk of mineral deposits forming stones.

Metabolic Disorders – Conditions like hypercalcemia (high blood calcium levels) or Cushing’s disease can contribute to kidney stone development.

Medications – Some medications, particularly those affecting calcium metabolism, may increase the likelihood of kidney stone formation.

Symptoms of Kidney Stones in Dogs

Dogs with kidney stones may exhibit varying symptoms depending on the severity and size of the stones. Common signs include:

• Frequent Urination – Affected dogs may urinate more often due to irritation in the urinary tract.
• Straining to Urinate – If a kidney stone obstructs urine flow, dogs may struggle to pass urine.
• Blood in Urine (Hematuria) – The presence of stones can cause irritation, leading to blood in the urine.
• Lethargy – Pain and discomfort may result in reduced energy levels.
• Vomiting and Loss of Appetite – Severe cases can cause nausea and a reluctance to eat.
• Pain in the Lower Back or Abdomen – Dogs may show discomfort when their lower back or abdomen is touched.
• Urine Odor Changes – Infection or concentrated urine may lead to a stronger urine smell.

“Kidney stones are rare in dogs and cats,” explains Dr. Jo Myers, a veterinarian on the Vetster platform. “Urinary stones are far more likely to develop in a dog or cat’s bladder.” – Dr. Jo Myers, DVM

Diagnosis of Kidney Stones

A veterinarian will diagnose kidney stones through:

• Physical Examination – Assessing symptoms and checking for pain in the kidney region.
• Urinalysis – Evaluating urine pH, infection presence, and crystal formation.
• Blood Tests – Checking kidney function and mineral imbalances.
• Imaging Tests – X-rays or ultrasounds can detect the presence and size of kidney stones.

Treatment Options for Kidney Stones in Dogs

The treatment approach depends on the size, location, and type of kidney stones. Common treatment methods include:

1. Medical Management

• Increased Hydration – Encouraging water intake helps flush out small stones naturally.
• Dietary Changes – Specialized diets help dissolve specific types of stones (e.g., low-protein diets for urate stones).
• Medications – Antibiotics for UTIs and medications that alter urine pH to prevent further stone growth.

2. Surgical Removal

In severe cases where stones cause blockages or pain, surgical intervention such as nephrolithotomy (removal of kidney stones) may be necessary.

3. Lithotripsy

This procedure uses sound waves to break down kidney stones into smaller fragments, making them easier to pass through urine.

Nutritional Advice for Dogs with Kidney Stones

A well-balanced diet plays a crucial role in preventing and managing kidney stones. The right dietary plan depends on the type of kidney stones a dog has.

General Nutritional Guidelines:

• Increase Water Intake – Providing fresh, clean water at all times helps dilute urine and prevent mineral buildup.
• Avoid High-Mineral Diets – Diets rich in calcium, phosphorus, or oxalates should be monitored, especially in predisposed breeds.
• Monitor Protein Intake – Excess protein can contribute to certain stone types, so a veterinarian may recommend a controlled protein diet.

Dietary Recommendations for Specific Stone Types:

Calcium Oxalate Stones

Reduce oxalate-rich foods such as spinach, sweet potatoes, and beets.

Feed a moderate-calcium diet, avoiding excessive calcium supplements.

Provide diets with balanced levels of phosphorus and magnesium.

Struvite Stones

Struvite stones are often linked to UTIs, so addressing infections is key.

A diet that promotes acidic urine can help dissolve struvite stones.

Prescription urinary health diets may be beneficial.

Urate Stones

Common in Dalmatians and dogs with liver conditions.

A low-purine diet (avoiding organ meats and certain seafood) is recommended.

Alkalizing the urine with prescription diets helps prevent recurrence.

Cystine Stones

More common in breeds like Newfoundlands and Bulldogs.

A diet low in animal protein is often recommended.

Medications may be needed to prevent stone formation.

Preventing Kidney Stones in Dogs

Prevention is key to reducing the likelihood of kidney stones in dogs. Pet owners can take the following measures:

• Encourage Hydration – Always provide clean and fresh water to keep urine diluted.
• Regular Vet Checkups – Routine urine and blood tests help detect early signs of stone formation.
• Maintain a Balanced Diet – Follow veterinary dietary recommendations based on your dog’s needs. Hire a dog nutritionist for added guidance.
• Monitor Urination Habits – Any changes in frequency, color, or odor of urine should be addressed promptly.
• Avoid High-Mineral Treats – Certain commercial treats may contain excessive minerals that contribute to stone formation.

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So…Can Kidney Stones in Dogs Be Treated Without Surgery?

Yes, in many cases, kidney stones in dogs can be managed without surgery, depending on the type, size, and location of the stones, as well as the presence of any underlying conditions. Non-surgical treatment options focus on dissolving or removing the stones using medical therapies or minimally invasive procedures.

Medical Dissolution

Struvite stones, one of the most common types of kidney stones in dogs, can often be dissolved through dietary therapy. Veterinarians may prescribe special diets formulated to acidify the urine and reduce the concentration of minerals that form struvite crystals. These diets are typically low in magnesium and phosphorus and may include brands like Hill’s Prescription Diet® s/d® or Royal Canin Urinary® SO™. Treatment duration can vary, but it often takes several weeks to months, and regular veterinary check-ups are essential to monitor progress Vca.

Non-Surgical Removal Techniques

For certain cases, non-surgical procedures can be employed to remove kidney stones:

• Voiding Urohydropropulsion: This technique involves flushing the bladder with a sterile solution to expel small stones. It’s typically used for bladder stones but may be applicable in specific kidney stone cases Vca.

• Percutaneous Stone Removal: In a groundbreaking procedure, veterinarians at UC Davis performed the first-ever percutaneous removal of kidney stones in a dog without prior lithotripsy. This method involves accessing the kidney through the skin to extract small stones, minimizing the need for invasive surgery.

Supportive Therapies

In addition to the primary treatment methods, supportive care plays a crucial role:

• Antibiotics: If a urinary tract infection is present, antibiotics are prescribed to treat the infection and prevent complications.

• Pain Management: Medications may be administered to alleviate discomfort associated with kidney stones.

• Increased Water Intake: Encouraging your dog to drink more water helps dilute the urine, reducing the concentration of minerals and aiding in the prevention of stone formation.

Limitations and Considerations

Not all kidney stones are amenable to non-surgical treatment:

• Type of Stone: Calcium oxalate stones, for instance, cannot be dissolved through dietary changes and often require surgical intervention.

• Size and Location: Large stones or those causing obstructions may not be suitable for non-surgical removal and might necessitate surgery.

• Underlying Health Conditions: Dogs with certain health issues may not be candidates for specific non-surgical procedures.

It’s essential to consult with a veterinarian to determine the most appropriate treatment plan based on your dog’s specific condition. Regular monitoring and follow-up care are vital to ensure the effectiveness of the chosen treatment and to prevent recurrence of kidney stones.

Kidney Stones in Dogs…The Stone Cold Bottom Line. 

Kidney stones in dogs can be a serious health concern, but with proper diagnosis, treatment, and nutritional adjustments, pet owners can effectively manage and prevent this condition. Regular veterinary checkups, increased hydration, and a well-balanced diet tailored to the dog’s needs are essential in keeping the kidneys healthy. By understanding the causes, symptoms, and treatment options, pet owners can ensure their furry companions lead comfortable and healthy lives free from kidney-related complications.

About Petworks

In 2021, Dr. Marty Goldstein DVM joined the pet care platform Petworks as an advisor in its Animal Nutrition care division. Dr Marty Nature’s Blend is on a mission to help your pets live their healthiest lives possible. Dr. Marty’s pet nutrition expertise and guidance has helped Petworks evolve and become the preeminent animal and pet nutrition consultation service for pet parents in North America.

In 2022, Blue Buffalo Founder Bill Bishop Jr. joined Petworks as Senior Advisor in our Animal Nutrition Care Division. Bill brings his extensive expertise in pet food innovation and business leadership. His guidance helps Petworks enhance our pet nutrition service offerings, helping to ensure that pet parents throughout the world receive trusted, science-backed nutritional support for their dogs, cats, and animals.