I have a 2 1/2yr old male leopard gecko that has been fed crickets all his life and I want to introduce him to superworms as crickets are not always available at my pet store. The problem is that whenever I give him some, big or small, he always goes and pukes them up in a corner an hour later. I have one other gecko that eats only superworms (he's 10 and wont eat anything else unless I hand feed it to him) and 2 others that will eat anything. I would like to at least have something else on hand for him to eat when I cant get crickets, any suggestions for food or ways to get him to keep it down?