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Why is my cat drinking and peeing so much after kidney issues?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 7 months and 2 days old

My cat of 7 months old was hospitalized at the vet for 3 days and 2 nights with kidney levels BUN 208 CREA 10.7 and after 3 days his levels had gone down to BUN 13 and CREA 0.7.. we were able to bring him home and the doc even said to forgo the kidney diet for now and come back in 3 weeks. However, he has been drinking excessive amounts of water and peeing a lot since he's been home. Is this normal?

2 Answers

Most Helpful Answer

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Answered By Dr. Leigh, DVM

Veterinarian

Published on November 3rd, 2016

It is concerning that he is drinking and urinating excessively. Since he is so young, I am concerned he has a congential kidney disorder causing kidney failure. He should have an ultrasound of his kidneys to look for abnormalities. Call your vet and give him/her an update to let your vet know he is drinking and urinating excessively.

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    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on

    No this is not normal, however it will help hopefully to lower his BUN even further. If he keeps up the excessive drinking you may want to call your vet and see whether he wants to recheck Briggs earlier than four weeks from now. Do not deprive Briggs of fresh water. Let him drink all he wants for now.

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