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My kitten is breathing hard with an open mouth. Is it serious?

Updated on September 23rd, 2025

Pet's info: Cat | Russian Blue | Female | unspayed | 5 months and 28 days old | 3 lbs

Kitten having trouble breathing. Open mouth breathing. Fvrcp vaccinated at shelter one month ago. Treated for mild uri with doxy and amoxy. A few days after uri cleated, she got severe congestion and breathing difficulty. Occasional sneezing. No nasal or ocular discharge. Saline applied to nostrils doesn’t help.

1 Answer

Most Helpful Answer

David Darvishian

Answered By David Darvishian

Veterinarian

Published on October 29th, 2017

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! So sorry to hear about Luna. I would advise that you get her evaluated immediately. Open mouth breathing is never normal in a kitten/cat unless they are extremely sick or very stressed. Your vet can evaluate her and advise a diagnostic and treatment plan. It is possible that she has a nasopharyngeal polyp, foreign body, fluid in her lungs, fluid in her chest around her lungs, etc. Some testing will probably be required including blood tests, chest x-rays, etc. Good luck with Luna.
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