Well, they are active during the night (sometimes). Zim normally comes out once every night to every other night, depending on his mood. He'll cruise the cage, climb to the top, then slither back down and into his hide. After feeding him though, he was really active. He didn't want to go into his hides.

I asked the guy at Noahs and he said, he could just be hungry still, so next week I'm going to try feeding him a fuzzy and a pinky.