It's nice of you to have a dog, but I'm sorry about the dog having MI. I feel sad about it, but then again, humans are as animal as dogs, so it's understandable. Maybe when you first got the dog, you secretly saw yourself in the dog and thought you could help it because of personal experience? I am not sure. Anyways, it's probably hard for you to accept an illness in something you thought would help you. Maybe you can work on it together? I'm sorry, I'm probably giving bad advice. I wanted to let you know I read what you wrote and good luck.