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My 5-month kitten with cat flu is mouth breathing. What to do?

Updated On September 23rd, 2025

Pet's info: Cat | British Shorthair | Male | unneutered | 5 months and 5 days old

My 5 month old kitten has been on antibiotics since Monday following the cat flu. He doesnt seem to be getting any better hes started breathing with his mouth open. I was also told on Monday he has a heart murmer. He was hand reared by myself and husband as he wasn't wanted by mum we bottle fed him and his siblings. The other kittens are on antibiotics also but they don't seem as bad as him my 2 adult cats also have the cat flu. I'm worried about him breathing with his mouth open and just sleeps

1 Answer

Most Helpful Answer

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Answered By Linda G, MS, DVM

Veterinarian

Published on February 28th, 2018

Hello. I am so sorry that Dito is unwell. It is a little early to think the antibiotics are not helping, & usually, we give them 72 hours to see if they kick in. But it may also mean that he may need additional care. I would recommend speaking with your vet, especially if chest x-rays were not done. Dito may benefit from a little steroid or a bronchodilator medication to help open the airways. He may need several hours or a day or so in an oxygen tank. Until then, you can do some steam therapy in your bathroom to see if this loosens up the respiratory secretions & helps him to breath. I do hope he is feeling better soon. Thanks for using Petco Pet Education Center, formerly Petcoach.

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