Petco Text Logo
Petco Pet Logo

Why is my cat pooping outside the box with loose, stinky stool?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Female | spayed | 5 years and 6 months old

One of my cats, not sure which, is having loose, large, shiny stools. The litter box stinks horribly. This cat has now started pooping outside the box in the same room as the litter box. This cat has also started pooping on the living room carpet. I have a part Maine Coon, 12 years old, and a short haired calico, 5 years old. Both indoor cats. They eat Halo indoor, geo free dry food. Help!

1 Answer

Most Helpful Answer

Image profile

Answered By Dr Stafford, BVetMed, MRCVS

Veterinarian

Published on July 11th, 2017

Issues with faeces such as these can be indicative of issues in the gut. It could just be inflammation such as gastroenteritis or colitis, but sometimes it can indicate problems such as inflammatory bowel disease or tumours etc. You could try adding a probiotic to both of their feed and see if that helps, but I think it would be worth taking them both to the vet for an exam if it continues for more than a day or so.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

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

Sponsored