My chicks are 9 weeks old now. They are not roosting at night. They lay in a pile by the door. They know how to roost because I have seen them on the roosts in the morning if I don't get let them out early enough. I checked on them last night before bed and they were still on the ground. My sister told me to put them on the roosts & they will slowly catch on. Is this something that I should do, or should I let them figure it out for themselves?