Well, I tried what nuttyredhead did, and put my young chickens in with my established flock last night, after all were sleeping. One of my silkies is just so small, though and one of my BR cross chicks has a crippled leg, so I went out early this morning before anyone but the alpha roo was up and took them all out. I would just feel so terrible if anything happened! My established flock killed a roo a few weeks ago, and he had been with the flock for at least a month----so I can't trust them with the young ones----guess DH better start thinking about building another pen!