Petco Text Logo
Petco Pet Logo

My senior boxer has a hard belly lump & mucusy poop. What's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Boxer | Female | spayed | 11 years and 4 months old | 70 lbs

My 11 year old female boxer has large hard bulge in abdomen extending mostly to her left side, passing small amounts of mucusy stringy poop. She is drinky lots and urinating properly. No vomiting. This has been going on for a couple of weeks

1 Answer

Most Helpful Answer

Image profile

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on April 23rd, 2017

I would have Abby seen by a vet for this bulge which could be a mass. Unfortunately in senior dogs, there is always a chance a mass could be malignant. It could be compressing her intestines and colon leading to small amounts of poop being passed. Any suspicious masses should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the mass to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. I would have Abby seen by a vet first thing on Monday to have this mass examined and diagnosed so it can be treated.

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