At 4 months of age Oz was diagnosed with a Grade 1 murmur caused by leaking across the mitral valve. Are there any therapies that others have tried to slow down or prevent the progression of MVD in dogs with a diagnosed murmur? CoQ10 has been mentioned, but I don't know the dose to use. Also I have heard about using Calcium Carbonate and there is supposedly a rosemary protocol. Anyone know of any of these? Since his murmur is only a grade 1 right now, his cardiologist has not put him on any meds and he is just to go in yearly for a cardiac follow-up unless there are worrisome signs - thankfully there are none right now. He is active, playful, and just a lot of fun.