We just recently got 5 chickens, our first. Anyhow, I have noticed that the first night we had them, they all slept on the floor of the coop, and since then they are all cramming together in the nest boxes. Is this something I should discourage? They look so sweet and cozy in there, plus we can open it up from the outside and my daughter can pet all "her" chickens goodnight. I've only seen one of them use the roost, is it maybe because they are pretty young?