I just moved my five hens into their coop a few days ago. They are just about 8 weeks old. At first they had to be "helped into the coop at night, but tonight they marched in one by one. Yay! The question I have is the behavior once they got into the coop. All five went to a corner of the coop and piled on top of each other. They were also making a lot of noise. I thought maybe something had snuck into the coop or it had mites or something, but when I opened the pop hole door, they stayed in continuing to pile ontop of each other. Is this normal? They seems fine otherwise when they are outside. They eat, drink, forage, etc.