Feline Urolithiasis: Preventing the Return of Painful Urinary Stones

Urinary stones cause pain, urinary obstruction, and recurrence in cats — long-term dietary and environmental management prevents most recurrence.

Key Facts

• Struvite and calcium oxalate are the two most common urinary stone types in cats with different management approaches
• Struvite uroliths can often be dissolved with a prescription acidifying diet
• Calcium oxalate stones require surgical or non-invasive removal — they cannot be dissolved medically
• Urinary obstructions from stones are life-threatening emergencies in male cats
• Long-term dietary management significantly reduces recurrence risk in both stone types

Welfare Considerations

Feline urolithiasis causes welfare suffering through the pain of stones within the urinary tract, the dysuria and hematuria of stone-related urinary irritation, and the potentially fatal complication of urethral obstruction in male cats. The welfare burden is ongoing — urolithiasis is a chronic condition with significant recurrence risk without dietary management. Struvite uroliths in cats are often associated with urinary tract infections or dietary factors, while calcium oxalate stones are associated with acidifying diets and high calcium content. Welfare-optimized management requires stone type identification by laboratory analysis, type-appropriate dietary management (dissolution diet for struvite; low-calcium, wet food for calcium oxalate), increased water intake, and regular urinary monitoring to detect recurrence before clinical signs develop.

What You Can Do

• Submit any urinary stones for laboratory mineral analysis — treatment differs completely by stone type
• Transition to a prescription urinary diet appropriate for the identified stone type
• Maximize water intake through wet food feeding and multiple water sources or fountains
• Schedule urinary ultrasounds every 6-12 months to detect stone recurrence before obstruction occurs
• Recognize the emergency signs of recurrent obstruction — straining without urine, crying in pain, lethargy