I'd wait 1 week before trying again. You don't want to stress him any more by offering him food repeatedly. Does he cruise around at night? I kind of know when Luna is hungry because she will cruise all over and climb her vines and hides and stare at her water in the water dish lol....but then again she does that 3 days after eating. Also i'm assuming you are warming it plenty and do all the "right" stuff? Some are just more picky than others. My JCP has gotten lazy and no longer grabs her mice from the air. I have to rub them on her body, then she goes bananas and grabs it and wraps it up lol.