I honestly have no clue hows it done. I have heard they can eat them as well, but I think it would be heavy for their tongue as well as hard to digest. Exoskeletons are easier to digest then bone. Someone may prove me wrong, but since chameleons are mostly insectivorous, I would just stay with the insects. I am thinking that the pinkie mice is a kind of last resort thing, same with eggs, if their normal food is scarce.