We have a new bunch of 18 chicks. They range from 2 to 4 months old and we have had them about 3 weeks. The place we got them from just had a box they went into a night. No roost so they slept on the floor in a bunch. We have a beautiful hen house that is 8' X 10' with ample room and several roosts. But they insist on sleeping in the same bunch right inside the door all huddled together. They are not cold - We are in CO and it is warm. We figured instinct would take over soon after they got used to being here and they would go to the roost at night. They get on it all the time in the daytime but won't go on at night. Will they ever go to the roost at night on their own? If we go out there after they are asleep they all move around and I cannot imagine trying to catch them or get them to stay on the roost even if we could catch them. Suggestions? We are going into fall and soon winter. We fear they will be too cold on the floor for winter even though it is well insulated. Thank you!