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My dog with a heart murmur is coughing and drinking a lot. What's wrong?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | spayed | 13 years and 1 month old | 11.22 lbs

My dog has been coughing for a couple days, and drinking excessive amounts of water. She has also been diagnosed with a grade 3 heart murmur, and is currently on a ten day treatment of antibiotics (Clavaseptin) for an anal gland infection.

1 Answer

Most Helpful Answer

Laura Johnson VMD

Answered By Laura Johnson VMD

Veterinarian

Published on February 12th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Decoder!

If Decoder is already on an antibiotic then that would ideally be helping for something infectious like kennel cough or pneumonia. My worry is the heart murmur and a new cough. She should be seen by your Vet for an exam and X-rays of her chest to check for congestive heart failure. Blood work can help figure out the increased thirst. Try to bring urine if you can. Causes for increased thirst are: cushings, diabetes, cancer, kidney or liver failure, UTI (less likely since she is on an antibiotic).

I hope this helps and I wish you and Decoder the best!
Vote Icon1Pet Parents found this answer helpful

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