We had taken Palu in for a routine check up and the vet she saw that day thought they heard a heart murmur. We had 5 other vets listen to Palu, including the cardiologist, and none of them ever heard a murmur. The vet who initially thought she heard it was never able to hear a murmur again either. Just to be safe, though, we had her echocardiogram redone to make sure we weren't missing something 2 months after the initial screen.