Urinary Tract Issues (FLUTD)

FLUTD encompasses a range of conditions affecting the bladder and urethra. The most feared complication — urethral obstruction — is almost exclusively a male cat problem. The male urethra is long and narrow, and can be blocked by mucus plugs, crystals, or small stones. A blocked cat cannot urinate at all. Toxins accumulate in the bloodstream rapidly; the bladder can rupture. Without emergency catheterisation, death occurs within 24–48 hours.

Feline idiopathic cystitis (FIC) is the most common FLUTD diagnosis and shares striking parallels with interstitial cystitis in humans. Stress plays a central role — changes in routine, multi-cat tension, moving house, or even changes in the weather can trigger episodes. Affected cats experience genuine bladder pain and urgency despite producing only small amounts of urine, often with blood.

Diet has a major impact on urinary health. Dry food produces highly concentrated urine, increasing the risk of crystal and stone formation. Wet food keeps urine dilute and flowing, reducing crystal deposition. Struvite crystals (the most common type in cats) dissolve with a prescription dissolution diet. Calcium oxalate stones cannot dissolve and require surgical removal or laser lithotripsy.

Stress reduction is as therapeutically important as dietary change for FIC. Strategies include ensuring cats always have escape routes in multi-pet households, providing high resting places, maintaining a predictable routine, and using synthetic feline pheromone (Feliway Classic) diffusers. Some cats benefit from anxiolytic medications long-term.

Recurrence is common. Cats with a history of FLUTD need lifelong management — appropriate diet, adequate hydration, and minimised stress.