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Why is my cat panting and breathing through its mouth? Is it serious?

Updated On September 23rd, 2025

Pet's info: Cat | Maine Coon Polydactyl | Male | neutered | 1 year and 2 months old | 15 lbs

I’m wondering if I should be concerned about my cat panting. I notice when he gets over excited that he starts panting. I also noticed yesterday when he was sleeping that he was exhaling out his mouth. He’s always had a bit of a nose whistle when breathing, could something be wrong with his respiratory?

1 Answer

Most Helpful Answer

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Answered By Rodrigo Roca, DVM

Veterinarian

Published on October 28th, 2018

Hello, I’m sorry to hear about Toby. As a general rule cats should not pant after exercise. It could be a sign that Toby has underlying respiratory disease, such as underlying asthma or an infection. I would recommend having him seen by your veterinarian so that they can perform an examination and work up, they will likely recommend performing chest X-rays. Hope this helps!

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