Tonight three out of six were in the main coop, on a roost. I put the other three inside and made sure they can join their flockmates...yahoo,they are about six weeks old.
Go figure, I have the same issue with 'store bought ' chicks, the broody hen seems to teach them how and when to go to bed. I started feeding mine in the area I want them to roost, and keep gathering them up and locking them in. At that age they will want to pile in together and chicks...