I currently have one coop with four hens that only go in at night to sleep and range the yard all day. When I peek in at night, they are all snuggled together into a chicken pile even though they have plenty of room to spread out. I wanted to add to the flock and thought about buying a second identical coop. Would the chickens separate themselves at night or would they all try to fit into the original coop. In which case, I might worry about over crowding. Any advice would be appreciated.