I have a Buff Orp that hatched 7 bantam chicks. The chicks are 3 weeks now and have been free ranging with mom since 1 week. Today one of the chicks has disappeared. I noticed the chicks are on the other side of the neighbors chain link fence sitting on the branches of the bushes. I have no idea what happened to the one chick, can't find it anywhere. Would it hurt the mom and chicks to be kept in the 2x3x8' cage they where hatched in? When it gets real cold I am thinking of letting the have access to the coop. Should I plan on enclosing the cage and insulate it? The coop is insulated. What do you all think? John