Renal

Urethral Obstruction

A blockage of the urethra so urine cannot get out, most often in male cats. It is a life-threatening emergency: a fully blocked pet can become critically ill within a day. The block is usually a gritty plug or a small stone, often on a background of feline idiopathic cystitis. A cat or dog straining and passing little or nothing needs a vet now.

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Expert guides

Will It Happen Again? Preventing a Re-block After Your Cat Comes Home

You've brought him home. He's a bit subdued, maybe shaved on one front leg from the drip, and you're watching the litter tray like it owes you money. That fear in your chest, the one that says "what if it happens again...

Dr. Alastair Greenway11 min read

The Blocked Cat: The Emergency Every Owner of a Male Cat Must Recognise

If you have a male cat, this is the one page about his health that's worth keeping in your head. A blocked cat is the single urinary emergency that kills, and it kills fast, and the heartbreaking part is how often it's...

Dr. Alastair Greenway12 min read

Can Dogs Get Blocked Too? Urethral Obstruction in Male Dogs

Most of this section is about cats, and for good reason: the blocked male cat is the classic urinary emergency, the one owners most often miss. But if you've got a male dog squatting over and over, lifting his leg and...

Dr. Alastair Greenway9 min read

PU Surgery (Perineal Urethrostomy): When It's the Right Call, and Life After

If you're reading this, you're probably exhausted. Your cat has blocked more than once, you've done the late-night dash to the emergency vet more times than feels fair, and somewhere in the last conversation your vet...

Dr. Alastair Greenway11 min read

What Happens at the Vet: Unblocking, the Catheter and the Hospital Stay

You've made the call, or you're about to, and your blocked cat is going in. That's the hardest, most important step done, because a male cat who can't pass urine is in a true emergency, not constipation and not a simple...

Dr. Alastair Greenway9 min read

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