I have 3 rhode island red hens that are a year old that were raised together and get along fine. One is a clear dominant and the other two are more subordinate and they all get along fine. This year I got 2 new pullets that are about 6-7 weeks old now. I've been keeping them in a 4x4x2 foot box on my back porch with a heating pad cave. I took some chicken wire and set up a play pen out in the grass in the back yard and the last few days when I get home from work and am around to keep an eye on them, I have been putting the two new babies out in the play pen to have some outside play time, dig in the dirt, get some sun, etc.
The 3 adult hens don't seem interested in the babies at all. They will come up and look at them, then move on without much interest. I put one of the more subordinate of the adults into the play pen with the babies and she ignored them for the most part, then randomly fluffed up and jumped at them. She didn't make contact and I seperated them quickly. The babies are fine.
Just wondering how I should go about introducing the new pullets to the existing hens?