I believe he is about 6-8 months old, living in a 18 X 18 X 36" glass cage filled with sanseveria and fed mostly crickets. I got him for a friend and he doesn't know much about reptiles. To me he looks small / skinny, but I have never kept crested myself, so I am not sure how big they should be at this size. Here are 2 pics to see the size. Let me know what you think. Could it have anything to do with the temps of the cage? He told me they were mid 70s but i think they are higher than that? Any suggestions? he says he buys 40 crix a week and they are always gone at the end of the week, but we both know they aren't escaping from the cage.