Do you have any UVB lighting on him? They definitely need that to digest and process calcium. I think your sister's right, it does appear that he may have a calcium deficiency. A nice UVB light and proper temps should help get his appetite going. Here is a pretty indepth website I found on them. http://www.helsinki.fi/~tuomola/schneider.html Also, http://www.anapsid.org/schneiderskink.html has some pretty good info. Good luck with the little guy, he's awfully cute