Trying To Get David To Eat More

I've never seen David eating anything. It's hard to tell with all the clothes he's wearing but I doubt he weighs much over 100 pounds. Two years ago, when I met him, he wouldn't get near any people or walk into a store. I've been able to get him to feel comfortable going into a few places but can't get him in a grocery store. I guess I'll have to start bringing him food, he really needs to eat.