I have a one year old flock of 7 hens and one bantam rooster. We just got 4 additional chicks, about 2 weeks old. They are in the brooder for a while yet, but I am working on the grow out pen. I was planning on putting the grow out pen either inside of the run or just outside of it so the birds can see and hear each other. My question is what to do at night? My older girls go into the coop at night to roost. I can put a small pen in the roost for the new chicks, but how in the world do I keep them separate during the transition from out to in and vice versa in the morning? I'm probably over thinking it.