My 4 buff Orpington hens are 11 months old. When I created their coop the roost was too small. As they got larger one of them decided to sleep in the nest box. Her tail feathers were always poopy. I installed a new roost to fit all four of them. For a few nights I put her on the roost. She still won’t go up there by herself. Is it unhealthy for her to sleep on the floor? Her vent isn’t poopy or clogged.