Last night I witnessed this for the first time. Mattie (I think she is 2nd in the pecking order) would stay at the doorway of the coop, blocking the door, and Hermoine (the lowest on the pecking order) just stood there waiting for her to move. She kept jumping down and going back up the ramp with the same results. Then Mattie went to the back of the coop making it look like she wasn't there anymore, and when Hermoine attempted to get in, she ran and pecked her, chasing her out. After watching her do this several times (it was time to close the coop, now getting dark) I went out there and tried to catch Mattie. She ran to the back of the coop and when Hermoine tried to go in, she ran and tried to peck her. Hermione managed to sneak into the house and get on the roost while I was watching Mattie, but Mattie approached again. I'm not sure if it was when Hermoine was flying up to the roost, or if she planned to peck me (it happened so fast). This time I was serious about grabbing her but she flapped her wings and went running up the ramp to the roost. Now, I am wondering if this happens again, what should I do? I got Mattie when she was 4 weeks old, and she was a feather picker then, but I just thought "oh, she's not as nice as the other chicks". All my chickens (4 hens and a rooster) are one year old. She continues to peck feathers out of the other hens, and has given another hen, Hilde, a bare butt. It is irritating, but Hilde just stands there and lets her do it. I have separated her from the other hens and kept her in a dog pen in the garage for about a week, and when she came back, I was hoping the pecking order would change; but it has not. Hermione runs from her so she still has all her feathers, and she dare not peck Honey as she is highest on the pecking order. Would appreciate some advise on what I should do.