If he seems to have trouble digesting whole worms, crickets, and greens, you can make him a smoothie by putting some worms, greens, and liquid calcium in a food processor with some warm water, (the consistency is totally up to you - one of my guys likes his sort of thick, but the other likes it watery) and either feed it to him with a plastic syringe or see if he'll lick it off of his nose. Since the food is sort of pre-digested it may enter his system more quickly so he'll get a little nutrition out of it even if he throws some up. As far as liquid calcium is concerned, you can mix it with food or water, or even give it to him plain if he happens to have his mouth open long enough to put a drop or two in. It's incredibly bitter (yeah, I tasted it . . .) and even though I've heard they can't taste the bitterness, they have to get used to it before they'll take it willingly.