Q: My 7-year-old, 20-pound mixed breed dog has a heart murmur. Her veterinarian thinks it's due to chronic valve disease.

A veterinary advice column reassured a dog owner that an irregular heartbeat in a relaxed dog may be a normal respiratory sinus arrhythmia, not heart disease. This breathing-linked rhythm change is ...

Two of my older dogs have heart murmurs that, while noted by the vet during each visit, have not required a serious intervention. That said, I'm also careful to keep their diet healthy, ensure ...