I agree with the above post by Satan...It sounds more like security issues to me. When you switch to a smaller enclosure try putting a lot of crummpled up newspaper in with him. I mean fill the enclosure up with paper. This will give him an overwhelming sence of security. This has worked with dozens of my balls that were not good eaters. I have been able to wean almost all of them off the newspaper but it took time. Bottom line, with the extra security, they ate.