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My cat's poop is hard and dark after constipation. Is it normal?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Female | spayed | 13 years and 5 months old | 9.5 lbs

Cat had vomiting and constipation 2 weeks ago. I rushed her to vet who treated her for UTI symptoms. She then passed large sized poop & is now acting normal, happy, good energy levels, eating/sleeping normally, and using litter box for urine and poop. HOWEVER, all poop is hard and tar colored. Not excessive amounts, and no diarrhea. No yellow gums.. Kidney function OK from the vet test. She eats Hills urgent care a/d and filtered water. My vet is very hard to access, so hoping for help.

1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on July 5th, 2017

As long as she is defecating regularly and not straining the firm stool may not be a concern. It is a little unusual for a/d to be recommended as a maintenance diet - you may want to check with your vet and see if there is another diet that would be recommended for Hopper given her constipation. This diet is very nutritionally dense, so it's possible that she's just not making much stool. If she has been straining, or you feel her stool looks black and tarry I would recommend making a recheck appointment with your veterinarian.

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