I intruduced the young girls to the old girls yesteday. They are fairly close to the same size, however there is about 5-6 months age difference. The old girls are picking on the new one and have them cowering into the corner of the coop. Should I take them back out? Will they start being nice? No pun but is this just a pecking order thing? I would have thought they would be glad to see them so the roo would have some one else to bother. I don't want them to kill my young one, any suggestions?