I'm heating up his mice now, but Magnus has never been fed in his tank before, I always used to put him in a feeding tub. I understand that can get stressful, plus I now have two adult cats and an inquisitive kitten who wants to know what's going on in the big purple tub So I decided it would be safer to feed him in-tank. Now, he's on a cocunut-fiber substrate. If it gets on the mouse, is it still ok for him to ingest? =/ It sounds like a newbie question because it is, for this situation.