Just moved my month-olds outside to the chicken tractor that's half run / half "house." Here's a noob question - in the brooder, they just slept on the pine shavings on the bottom. There are two nest boxes in the coop house - should I put shavings down in the nest boxes, or will that teach them bad habits, like "don't sleep in there, that's just for laying eggs"? There is also a roost/perch in the coop house but I don't know if they are smart enough to go sleep up there. What's a chickie mother to do?