My chicks are 2 weeks old and mother hen had been locked in the nest box with them since they hatched. I opened the door while my other hen was out foraging and let her bring them down to the lower coop. They were all very excited to take a dust bath. I blocked off a separate area for my other hen where she can see mom and the babys but not get to them because I was afraid she might peck them. My question is, will mother hen take them back up to the next box when it gets dark. The lower coop is pretty open and I thought they would be warmer if she took them back up.