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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

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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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