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Is it normal for my 4-month-old kitten to pant and hack after playing?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | unneutered | 4 months and 16 days old | 5 lbs

4 mo old domestic short hair kitten. Starts mouth breathing/panting when playing aggressively with our other 2 kittens of same age but of 3 different litters do not. One episodes of hyperventilating too and twice “unproductive hacking” (head low gestures as if bringing up a hairball). Currently all being treated (2nd month) for round worms with ‘safe-guard’

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on August 6th, 2018

Your kitten will need to have an exam by your veterinarian. She could be suffering from a congenital malformation of the blood vessels near the heart or have a hole in the septum of the heart. This would often not show when the kitten is resting, but when it exercises, runs and plays there is not enough oxygen being pumped to the lungs and muscles because oxygenated and used up blood mixes. Problems often do not occur until 3-4 months of age. Please make an appointment with your vet for an exam.

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