Hi, so I have 16 new chickens (about 5 months old), and I've got them to roost in the outdoor run of the chicken coop, but now that it's getting colder they need to roost in the house. I think there is plenty of room in the house, but they won't roost in there, instead they roost in the run. I know they're not scared of them, because both groups free range together all day. So how do you get the younger birds to roost in the coop with the older ones?