First I'd suggest a read through of the following three threads to help address any shedding or refusal to feed issues. They should be helpful and give you some ideas of things to try.

http://www.ball-pythons.net/modules/...warticle&id=59

http://www.ball-pythons.net/forums/s...ad.php?t=28794

http://www.ball-pythons.net/forums/s...ad.php?t=74290