I've got 6 girls and 1 rooster. One of my girls will not roost at night... she sleeps on the floor of the coop. I've tried to place her on the roost, but she jumps down. I hate to move her to another area for the night...but I'm really concerned she will get sick or hurt. Any ideas? Thanks in advance. General info: The girls are RIRs as well as my boy. They are about 3yrs old. They are all eating, drinking, and they free range all day. She is able to jump, and her feet are fine. Help?