French Bulldog Heart Murmurs: What Every Owner Should Know

It means a vet has detected turbulent blood flow through the heart via stethoscope. It's a clue that something — most often valve changes, sometimes a congenital condition — is affecting normal blood flow, and further testing clarifies exactly what.

On a scale from 1 (very soft, hard to detect) to 6 (loud enough to feel as a vibration through the chest wall), based on intensity as heard through a stethoscope.

Not reliably — grade reflects loudness, not necessarily the severity of the underlying condition, which is why an echocardiogram rather than grade alone is used to assess actual severity.

Most commonly valve disease from age-related degeneration, though congenital structural narrowings present from birth, and less commonly other conditions, can also produce a murmur.

Many vets recommend one for newly detected murmurs, particularly in young dogs or those with a higher grade, to identify the underlying cause and guide any treatment decisions.

Some very mild murmurs, particularly certain congenital 'innocent' murmurs in puppies, can resolve as the dog matures, but murmurs from valve degeneration or structural disease generally don't disappear on their own.

These are generally lower priority than higher grades, and many are monitored rather than urgently treated, though your vet's assessment of the specific cause still matters more than the grade alone.