Australian Shepherd Heart Conditions: Making Sense of a Confusing Category

Not particularly — heart disease isn't one of the conditions documented as common for this breed the way hip dysplasia or eye disease are. It can still occur, as it can in any breed, but it isn't a hallmark risk for Aussies specifically.

A murmur is a sound your vet hears, not a diagnosis. It's a signal that blood flow through the heart is turbulent somewhere, which can point to a congenital defect, a degenerative valve problem, or sometimes nothing clinically significant at all. It's the starting point for a workup, not the end of one.

Timing is the biggest clue. A congenital issue is typically flagged by a murmur at a puppy or young-adult exam. Age-related degenerative disease shows up later, usually in dogs past seven or eight, with gradually creeping symptoms rather than something present from the start.

Normal, well-conditioned exercise doesn't cause heart disease. But a dog with an underlying, undiagnosed heart issue may show that issue specifically during or after exertion, since that's when the heart is working hardest. That's different from exercise being the cause.

An echocardiogram (ultrasound of the heart) is the main tool for structural issues like valve disease or congenital defects. An ECG or 24-hour Holter monitor is used instead when a rhythm problem, rather than a structural one, is suspected. Chest X-rays and bloodwork often support the picture too.

No. Many puppy murmurs are mild and either resolve on their own as the puppy grows or turn out to be clinically unimportant. But any murmur found in a puppy should be reassessed at a follow-up exam rather than assumed to be nothing, because a few do point to something that needs monitoring.

A stethoscope check at every routine wellness visit is standard and enough for most healthy dogs. If your dog is heavily active in a demanding sport, or you've noticed any stamina change, mention it specifically so your vet listens with that in mind.