Pets are very important. If it helps you any, a vet told me about a year and a half ago that my dog had a heart murmur. I had a scan done of her heart, and it was enlarged. I had a funny feeling it was just old age, and the doctor was just young and over-reacting, because the dog seemed fine. The dog has been fine, it turns out. I went to another vet this year and he had nothing at all to say about her heart.