I have three chickens and seven new ones. the older girls are almost 18 months and the new ones are 6 weeks. I have let them run together in the run, keeping a constant eye on them. The older girls actually run away from the little ones? I went in tonight to put everyone away for the night and some how a new one got in with the older ones?!? (maybe wiggled under a fence and through a cinder block, not too sure, yet) The older girls were completely ignoring the new one and going about their roosting and such. ANYWAY, does it seem like I can introduce the new ones yet, or still too soon? They are not nearly the same size, but the older girls are not seeming to mind. what do you think?