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My cat won't urinate for a vet sample. Is this a medical emergency?

Updated on September 23rd, 2025

Pet's info: Cat | Domestic Mediumhair | Male | neutered | 18 lbs

Port has had blood in his urine for months, despite numerous treatments and tests. His vet wants a urine sample, so he's been in a cat condo with an empty, clean littet box for three days now. He's passed bowel movements, but absolutely is refusing to urinate. How bad is this, and what can/should I do for him? He usually drinks a flow waterer container a day, but has slowed down with that too.

1 Answer

Most Helpful Answer

Sarah Box, BVSc

Answered By Sarah Box, BVSc

Veterinarian

Published on April 28th, 2018

Lack of urination is certainly concerning. Port may simply be holding his urine, or he could be suffering from a bladder obstruction. I would contact your regular vet and let them know how things are going - they may consider collecting a sample directly from Port’s bladder using ultrasound and a long needle. This has the benefit of being a sterile sample, of cultures are needed. If your Vet has concerns that Port has a bladder obstruction they may also recommend X-rays to check for stones. I would seek veterinary care today, as a bladder obstruction can potentially be fatal.
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