I have 12, 10 week old chicks. At night when they roost, they all face the wall instead of facing out, why is that. I have two perches, ladder type but they all manage to squeeze on the highest one and face the wall. As they get bigger there won't room enough on one perch, I don't understand why, if it's a problem and if they will eventually split up and use the two perches. Any suggestions would be appreciated.