Is roosting "natural" IE something they generally do on their own at some point as they mature? My chicks are 4 weeks, they will go on their roost to sit and even play but, they do not sleep up there at all. It is currently just a temporary roost about 18" off the floor. It is a straightish tree limb. They had this limb in their brooder since they were about 1.5 weeks. Just 3 days ago they moved to the coop and I raised the roost from 4" to the 18". Even in the brooder they did not sleep on it. They just seem to still like sleeping in a "puppy pile" on the floor. Should I "train" them to roost? give it some time? not worry about it at all. Their coop is (I believe) predator proof.