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Why is my old dog coughing and breathing heavy when excited or sleeping?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | spayed | 5.8 lbs

For the past 3 weeks my chihuahua/dachshund has had a cough and heavy breathing. Especially when she is excited or sleeping. What could this be? She is 10 years old.

1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on January 13th, 2020

It is concerning that Coco is breathing heavily when she is sleeping - I'd be concerned that the cough could be due to heart disease or a respiratory disease. I'd recommend having your vet examine Coco. They might recommend chest x-rays as the first step.

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