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My cat has black, tarry, bloody stool. Is this an emergency?

Updated on September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 5 lbs

Hello, Odin my 2,5 yo cat saw a vet 4d ago & they did blood test (attached). Now Odin is under Cefalexin 250mg been 4d already, it’s prescribed for 2w. He still eats through syringe with my assistance. He drinks a lot of water and pee frequently, his old habit. He just defecated but it’s black, tarry & I noticed blood spot. What’s the possibility and what’s the prognosis if I can only bring him to the vet only 9h from now?

1 Answer

Most Helpful Answer

Rodrigo Roca, DVM

Answered By Rodrigo Roca, DVM

Veterinarian

Published on January 21st, 2020

Hello, sorry to hear about Odin. It looks like he has a severe infection, however I cannot tell you based on those results where. With he signs you are seeing, I would worry that he could have a kidney infection or a GI ulcer or even a GI perforation. Particularly the tarry stools make me concern that he could have an upper GI bleed from an ulcer or perforation. I would actually recommend having him evaluated now or as soon as possible by an emergency or your primary veterinarian. It sounds like he may actually require to be hospitalized and be treated aggressively with medical management. Hope this helps and best of luck.
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