i feel like my chameleon is getting fat. i normally feed him him about 15 crickets a day and he is 4 months old. so i cut down the amount or feed him every other day?
plus i noticed that he has like this fat bump behind his anal, i dont know if that is his sack.
Keep feeding him that much, he is a juvenile and still has a lot of growing to do. You don't need to go to every other day feedings until he is an adult. As far as the bump, it is called a hemipenal bulge, that is just part of him being a boy, if you know what I mean lol.