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Why is my 3-month kitten breathing heavy, sluggish, and not eating?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Longhair | Male | unneutered | 3 months and 25 days old | 4 lbs

Hi my 3 month old kitten is breathing very heavy and has mucus in his nose and mouth. He is very sluggish and not as playful as usual. He won't even eat his favorite treat. What does it mean?

1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on April 26th, 2018

I would worry that Charlie has an upper respiratory infection. Viral disease is most common, and a secondary bacterial infection could occur as well. I’d recommend having Charlie examined by your veterinarian. If you think he is having enough difficulty breathing that he is in distress you should see an emergency veterinarian.

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