Well thats open for debate, some people say not to feed in there cage they live in and to feed in a seperate tub. This is the belief that if you feed in there enclosure they could believe that everytime you open it they could think that it is dinner time. Personally i feed in mine and have no problems at all, many people i know feed in enclosure there enclosures as well. So two questions, how long have you had him and could he be in shed? You can not always tell when they are going into shed, and mine start to get testy before they shed.