I'm new to the chicken world and wondering how important sides and a roof on the nesting boxes are. Right now they are just open boxes and I have my Polish sleeping in there. She hasn't started laying but wondering if the design is too comfortable. They have 1 side b/c they bump up to the frame of the coop but the other side and top is open to the rest of the coop area. Does it make a big difference? thanks for your help!