My guy is stubborn and will eat anything BUT hornworms. I think he must not like the color or something? Because he was turned off of them from the start. I really wanted to get some in him because he was a little dehydrated at one point, so what I would do would be to hold a little tiny roach or cricket against the worm, and when he would go to get them he would hit the worm too. He seemed to like them once he was actually eating them cause he didn't spit them out or anything. But that worked for me!