I am on the verge of tears! Cassius has had a murmer since he was six months old, his vet said it was about a 2 on the scale of 1-6. This past weekend I had to bring him to the emergency vet because he woke up and couldn't put his back paw down (he is fine, soft tissue damage...too much play). When the vet listened to his heart he said "that's a doozy" I said oh his murmer? It's about a 2, he said no it is more like a 4! I was stunned! I scheduled an echo for tomorrow but when I went to get his records his regular vet had me bring him in and he said it is still a 2 and also he had another vet check and he said the same thing. Cassius is only 13 months old and I am worried sick about him. Does anyone out there have boxers with murmers that are doing ok?