We added four 8 week old girls to the flock about 2 months ago. During the day they now free range with the hens. Last week we removed their teen sleeping crate and fencing within the chicken run and moved them to the hen house with the big girls. (same space without the restrictions.) The teens are not interested in sleeping on the roost...(plenty of room) but on the floor of the hen house. They'll get pooped on! How do convince them to sleep on the roost where it is safer and warmer? I moved them up, but they jump right back down. We have several roosting poles in the yard that they use during the day, so they know how. Any advice? Will it hurt them to sleep on the sand?