I have my four girls in a very decent sized chicken house with a full play yard. Lots of roosting room for them both inside and outside. I've seen them use their indoor roost a bunch of times during the day. I got them when they were 3 days old. Even as babies when I had them in a fancy wooden box set up with a roost inside they only occasionally would sleep on the roost, usually they slept in a pile together. At bedtime they sleep in a big pile on the ground against their window. Any reasons why? Should I worry?