I have 4 hens, since birth 18 months ago. I introduced two new young hens (one year old and laying) into the group. one was a Rhode Island Red, the other an Easter Egger. Well the RIR is/was a flyer. before night the first day she had flown over the run walls numerous time. BTW -none of the others have ever manged a flight that high. I was going to clip her flight feathers the next day, but the last time she went over, she escaped. I got a call from a neighbor down the street who saw her in his yard. I went to get her but she had escaped. then about an hour later I got a call from someone saying she was on their porch (about 2 city blocks away) I went to get her, but she had disappeared and I could not find her. I left corn and a small coop out, but she never returned and I think she is probably gone for good.
Now the issue is the other new hen. My original 4 are merciless to her. they are now even poking a hole in her eggs.
I am thinking about getting another Easter Egger from her flock but it might be too late for them to be bonded and make a "team".