He is doing PT three times a week to build muscle, which helps with his appetite and I am giving him protein, cheese, creamed potatoes & gravy, even cookies, along with 2 Boost Very High Calorie (530 calories per bottle) every day. He not only hasn't gained weight, he lost a pound as of this morning! What gives! He isn't sick and has been checked out for other issues. He is fine, just won't eat enough! It is very worrisome!