Yes, and they will. If you have a deep rack you can get away with not giving them hides, but I gave up on this recently since my adult male wasn't doing too well and my girls seemed a bit stressed. So I have a hide for each of them and they still thermoregulate. Mind that I also use unprinted newspaper as bedding and it doesn't really fit so I put a decent bit of the extra in the front so as to darken the whole space so they kind of wind up in one huge hide.