We have Three 1 year old Hens, and Four 4 month old Hens out in the Coop/Run right now. We have Four 1 month old Chick's waiting to be moved out to the Coop. I'm just wondering how old they need to be before they can move out to the coop?? The temp's here in MICH have been warm/hot, and they are fully feathered and not using a heat lamp anymore. But I am wondering is it okay to move 1month old chicks in with the older girls... ?? We were going to move them out when they were about 6 weeks. Thanks!