Hi all. I've got a Speckled Sussex hen that went broody and is sitting on 2 eggs now for about the last two weeks. She is sitting in a typical cat litter box (with the top removed) that has a pan wall that is about 8 inches tall. Once the chicks hatch, how will they get out? Would I just move her and the chicks out of the pan and to a corner in the coop? I'm assuming I don't need to do anything like add a heat lamp or anything since momma will keep them warm, correct?