Taking Hail to the Dr. Today

We're getting ready to go to Hail's dr. appointment. I made an appointment for him because he seems to always be hungry but isn't eating anything. He stores his food all around the house instead of putting it in his little body. It worries me some but he isn't losing weight. I just need to know for my own peace of mind that he is nutritionally sound. We are also going to get some vaccines today... that's the not fun part.