My chicks are 9 weeks now and have been in their coop for 4 weeks. The go in at night from their run perfectly, but they oddly ALL (7) crowd onto a very small section of the roosting pole. Usually one or two chicks get stuck under the others sitting on the poop board. I'm not sure if they stay like that all night but the ruckus they make getting settled in is crazy. Any clue as to why they do this?