We were given a 1.5 yr old Barred Rock hen, this fall and I'm working on integrating her in with my original 3 Barred Rocks (6 months old). We live in the city and they don't free-range. My girls have a nice little coop but there isn't much room for my new chicken to get away. We've had her for a month now and for the past couple weeks, her pen has been right up next to the coop. So, they've met, but with 2 fences between them. Today, I tried putting her in with them, but it didn't go well. She had no problem with 2 of them, but the dominant one actually got a hold of her comb and drew some blood. After that, I separated them again. Any suggestion on what I should do now? Thanks!