about 6 months ago Wrigley started losing some muscle mass in his face. At first I thought it was just the extra exercise that he was getting, but the muscle loss has continued. The muscle above the eye socket, below the jaw, and near his ears continues to decrease. My local vet could not come up with any diagnosis after doing blood work, but did not think it looked healthy. Do you have any suggestions to what might be going on? Thank you.

