I recently went to the vet and got both my cats an annual exam, rabies, and everything. Sugar was perfectly healthy but Twinkie was being a bit difficult and growling so the vet couldnt really tell if he did have a slight heart murmur or not. This really concerns me and the vet told me to come back so I can check this out to be sure. Has anyone had this problem, or had a cat with a heart murmur? It sounds pretty serious and I would definitely get all the x rays and everything done when I get money soon. Any suggestions on what to do would help :?