What is the first sign of a heart issue in dogs? - Brunswick Veterinary Hospital
The first sign of a heart issue in a dog varies. In some cases, a dog that used to be able to run three miles a day may now barely make it down the block. Another sign could be a persistent cough that lasts for several months, which doesn't seem to be going away, even though the dog doesn't appear ill in any other way.
Contributed by Dr. Ryan Sherwood DVM
from Brunswick Veterinary Hospital
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