Bladder Stones in Dogs: Types, Symptoms, and Treatment Options
Bladder stones (uroliths) are mineral deposits that form in the bladder. They are common in dogs, cause significant discomfort, and can create life-threatening obstructions if a stone lodges in the urethra. Critically, treatment depends entirely on stone type — the wrong approach can make things worse.
Contact your veterinarian if your dog shows any urinary symptoms. A complete inability to urinate is a life-threatening emergency requiring immediate care.
| Type | % of Cases | Cause | Treatment |
|---|---|---|---|
| Struvite | ~40–50% | Urinary tract infection (usually) | Dissolution diet + antibiotics; or surgery |
| Calcium Oxalate | ~35–40% | Metabolic; genetic predisposition | Surgery or minimally invasive removal (cannot dissolve) |
| Urate | ~5–10% | Liver shunts; Dalmatian genetic variant | Low-purine diet + allopurinol; treat underlying condition |
| Cystine | ~1–3% | Inherited metabolic defect | Dissolution diet; may recur |
Why Stone Type Identification Matters
A struvite stone can be dissolved over 4–8 weeks with the right prescription diet plus antibiotics — no surgery needed. A calcium oxalate stone cannot be dissolved by any diet; attempting to dissolve it wastes weeks and delays necessary treatment. This is why stone analysis (either of retrieved stones or via culture and imaging to determine likely type) before treatment is critical.
Diagnosis
Your vet will recommend urinalysis (checks for infection and crystal type), abdominal X-rays (most stones are radiopaque and visible on X-ray), and possibly ultrasound. Some stone types are radiolucent and require ultrasound or contrast studies to visualize.
High-Risk Breeds
Miniature Schnauzers, Bichon Frises, Shih Tzus, Lhasa Apsos, and Yorkshire Terriers have the highest rates of calcium oxalate stones. Dalmatians, English Bulldogs, and Black Russian Terriers have higher rates of urate stones. Annual urinalysis is recommended for these breeds from middle age onward.
Frequently Asked Questions
What are the signs of bladder stones in dogs?
Signs include frequent attempts to urinate with little urine produced, bloody or discolored urine, straining to urinate, licking at the urinary opening, and in severe cases, a complete inability to urinate (urinary obstruction — a medical emergency). Contact your vet immediately if your dog cannot urinate.
How are bladder stones treated in dogs?
Treatment depends entirely on stone type. Struvite stones can often be dissolved with a prescription dissolution diet over 4–8 weeks. Calcium oxalate stones cannot be dissolved and require surgical removal or non-invasive procedures. Stone type must be confirmed through urinalysis and imaging before treatment is chosen.
Can bladder stones in dogs be prevented?
Prevention strategies depend on stone type. In general: ensure excellent hydration (canned food helps), prescription prevention diets for dogs with recurrence history, appropriate urine pH management, and treating underlying infections promptly. Dogs with a history of stones should have annual urinalysis and periodic X-rays.