I've been keeping hens since 2006 and have never had a batch of girls not roost. Well, that's not entirely true. When they're out in the run they go right up on the outdoor roosts and enjoy the day but at night they come inside their cozy clean coop and plop down on the floor. I totally don't get it!!! I've tried putting them up there myself and they jump right back down, what the hecks their problem!