Quote Originally Posted by kc261 View Post
Constricting but not eating food is usually a security issue. Snakes are at their most vulnerable when they are swallowing their prey, so they just won't do it if they don't feel safe. Since it used to work for this guy to eat in a paper bag, I would go with a similar approach. Drop the food in his enclosure, wait just long enough for him to strike so you know he has the mouse disabled, then cover the enclosure with a towel. Then quietly turn off the lights, and leave the room, and leave him alone.

Since it seems like this guy was shy at first, then ate fine for a long time, and now is having issues again, I'd also be looking for what has changed, and trying to eliminate sources of stress from his life.

agreed with the quote above. the paper bag was to make him feel more secure. Try feeding in the dark or a smaller container in the dark. and after he coils the mouse, leave him be for an hour or more, don't keep checking on him as this can also keep him stress and not feeding.