Like savage mentioned starve him for a few days, did you get him used to some snacks/treats? IF you did you might want to try to ween him off that and try to get him back on track with a staple pellet. Could be he just got used to eating some good munchies and now won't eat anything except for that. . . . . . . Nice devil by the way. . . . Anyone else notice a trend of red devil threads? . . . Ha!