I keep my big guy in aspen bedding lined with paper towels in the bottom. The sand seems to get in there eyes so I go with aspen and he can dig tunnels easier. My big guy didn't eat this past week either. Kinda strange since he always eats every weekend and he just shed about 2 weeks ago so he was off feed then back on. He just kills them and then leaves them there. Left them overnight with him temps are perfect 89/81 humidity about 56% and he is trying to get out, cleaned the cage tried to feed again and again he killed then left it. He is a strange boy, but it wouldn't hurt my guy to lose a little.