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Why is my cat's poop liquid after antibiotics and missing litter box?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Mediumhair | Male | unneutered | 8 lbs

Took my cat mittens to vet for diarrhea and they said he had worms and bacterial infection, two weeks of antibiotics later he's acting fine and eating and drinking but he is having liquid poop puddles and doesn't make it to his litter box, also he is on an easy digest cat food the vet have and I can't afford to bring him back in yet but I'm worried

1 Answer

Most Helpful Answer

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Answered By Makenzie Kurth, DVM

Veterinarian

Published on February 24th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! I want Mittens to get checked out but it's not an emergency. The fact that he is eating and acting normally is huge and a very good thing. It could be that his GI tract has just been very upset by the antibiotics. While you gather the money for a recheck appointment, try a probiotic like Purina FortiFlora (use as directed on the box). You can also add a fiber supplement like Benefiber powder (tasteless- 1 tsp with each meal). Stay on the GI diet given by your vet as this is likely also helpful. If this seems to fix the problem, great! If not, get into the vet as soon as you are able to get other medications for the diarrhea. Best of luck to you and Mittens!

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