Could use some advice, I have a 2 year old barred rock and she sleeps in a tree during the spring and summer, in the winter I put her in the pen(have to get her out of the tree) for warmth, otherwise she'd probably freeze to death! Anyway, I have some young chickens ( about 12 weeks old) they now get to free range and she doesn't want anything to do with them. So heres my ? should I lock her in the pen with the little ones now or just wait untill fall early winter and do it? How long do I need to keep them in there?