My only thought would be when your offering him food by hand, do you try to offer him food by hand before he gets his daily food or just randomly through out the day after he has been feed. It may be that he's just full. None of ours have ever taken a cricket or worm, I thinks the way you have to hold them, if I try to offer a cricket or worm by hand holding by pinching my fingers together, they will not take it, they just look at me like I'm crazy. But if I offer the feed from my palm, it's game on. And I really only offer the treats by hand, silks, butters, horned, etc.. Seems to work for me, they love there treats.
