heh, I have one sub-adult retic that does this. To an extent its a routine now. I feed her, she wraps it for an hour, loses interest, holds onto feeding mode and will follow your every move. Once I get back into the cage with some tongs, I pick up the rat, jiggle for half a second. She wraps again, I pull tight on the tail a few times to imitate it kicking. She generally eats it after that. If she drops it again though, its rinse and repeat a third time and she's never gone past the third attempt to eat. She's done this ever since I've had her, I just consider it her quirk and run with it. You may have to do the same.