Petco Text Logo
Petco Pet Logo

How long will my kitten's diarrhea last after roundworm deworming?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | unneutered | 3.6 lbs

My kitten is 3 months old and he had a fecal exam a few days ago and they found roundworms. He had been having diarrhea before we knew, and he received his first deworm med then, but he is still having diarrhea. How long is diarrhea supposed to last? He is getting his second and final deworm med in two weeks.

1 Answer

Most Helpful Answer

Image profile

Answered By Penelope Graben, DVM

Veterinarian

Published on March 15th, 2021

Hello there, It can take several days for diarrhea to clear up. He is likely still passing one life cycle of dead worms, and the intestines need to heal from the secondary parasitic inflammation. I would expect his stools to be totally normal several days after his next deworming in two weeks. Your vet can recommend a bland diet or probiotic which may help Zion resolve or manage his diarrhea better and faster. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach.

Vote icon

8Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored