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Why is my old cat with kidney disease suddenly weak, thirsty, and not eating?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 20 years and 9 months old | 7 lbs

My 20 year old cat has kidney disease which has been managed with Semintra for the last couple of years. Suddenly yesterday she is having a lot of trouble walking on her back legs, and keeps crying to be put in the bathtub either outside the bathroom door, or even standing on her legs she can barely walk on to prop her front paws on the ledge. She has also been looking at her food and water, but not eating it. Just standing at it and staring. I'm really worried.

1 Answer

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on October 8th, 2017

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Pepper! 20 years old is amazing! It's hard to say why Peppers back legs are having so much trouble. It could be from weakness from progressive kidney disease or a new problem like high blood pressure, diabetes, anemia. She likely has arthritis at her age. Sometimes older pets can have strokes or even brain tumors as well that can cause behavioral and gait changes. It sounds like she is extremely thirsty (trying to get in to the tub). If Pepper hasn't had her blood work checked in a while I would call your vet monday and have her seen. If you think she is suffering take her to an Emergency hospital today for evaluation, they can run the blood work today in house. I hope this helps and I wish you and Pepper the best!

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