Why is my cat's poop black on antibiotics for mouth infection?
Updated On September 23rd, 2025
Pet's info: Cat | Mixed Breed | Male | unneutered | 7 months and 3 days old
Hi my cat's poop its black i mean realy Black.. Its not diaria but its black.. He is with antibiotics beacuse he had an infection in his mouth.. He eats normally..
2 Answers
Most Helpful Answer
Published on March 8th, 2020
Hello. It is very common for some antibiotics to discolor the stool. As long as he is eating & feeling well, I would not be too concerned. You might call your vet tomorrow & just make sure this is a possible side effect from the medication that was prescribed, but I would not be too worried. Thanks for using Petco Pet Education Center, formerly Petcoach.
6Pet Parents found this answer helpful
Related Answers from Veterinarians
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Published on December 15th, 2018
Hello. I am sorry for your concerns about your kitties misfortunes. I would not be too concerned about the stool. It probably is due to the antibiotic discoloring the stool. The important things are their appetites & color. If they are eating & drinking fairly normally & their mucous membranes ( gum tissues just above the canine teeth ) is at least a pale pink color, then they are probably healing well. The stools should clear up within a few days of stopping the antibiotic. Thanks for using Petco Pet Education Center, formerly Petcoach.
1Pet Parents found this answer helpful
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