Petco Text Logo
Petco Pet Logo

Why is my senior cat's belly swollen with kidney issues and fluid?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Mediumhair | Male | neutered | 16 years and 2 months old | 20 lbs

My cat is 16 years old, he has had no health problems but a few weeks ago he was to have a teeth cleaning and found to have reduced kidney functions and was put on supplements which didn't help, around this time he started to gain a lot of weight but localised to around his stomach and it looked very spherical and unusual, he was eating less, two different vets said it was nothing then finally a third said he's filling with fluid maybe from a tumour and we can't do anything. Do you agree?

1 Answer

Most Helpful Answer

Image profile

Answered By Dr. Leigh, DVM

Veterinarian

Published on October 2nd, 2017

So sorry that Paws is having this problem. If he has free fluid in his abdomen then he could have a tumor but it could also be caused by a decreased protein level. Your vet could submit a sample of the fluid to the lab to try to determine the cause. Also an abdominal ultrasound might help diagnose the problem. Without knowing the exact cause, it is hard to determine if anything can be done to help treat the problem.

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