The vet noted in Belle's records that she has dilated cardiomyopathy. However, she went on further to state that it may be a very early manifestation of boxer cardiomyopathy. I did not realize they were considered two distinct diseases. I thought that dilated cardiomyopathy was another stage of cardiomyopathy where the walls of the heart become thin, the heart muscle weakens, which leads to heart failure and heart arrhythmias. Another note the vet made about Belle's condition was that it could be possible that she was exposed to a virus, such as the Parvo virus, in utero. I was very surprised by this statement because I thought it was common belief that this was a genetic condition. She told me that no matter what caused Belle's condition, there is very little difference in treatment protocols. With regard to the supplements, the vet advised that they *may* help strengthen the heart muscle so I am willing to give them a try. At this point, the medications are not doing anything to repair or strengthen the heart, they are only helping the heart do what it is supposed to be doing. As a side note, these supplements are quite costly, especially the L-carnitine.