Ya when he poops you should be able to find it, there not small and they stink. When my adult female goes I can smell it as soon as I go downstairs. And its funny because this is only time she tries to get out of her enclosure, she cant even stand the smell of herself. L.O.L Also if you notice he has moved from his old burrowing site to a new one sometimes this is an indicator he has pooped in that hole.