So this morning I removed a hen from my flock, and this afternoon when I got home one of my hens is missing her longer tailfeathers. my first thought was, who's been messing with my girls? Then I noticed all 14 of them have light feather damage all being on their backs in front of the tail. Watched for a bit and it seems several are pecking the whole bunch. They even pecked me! The smallest hen is borderline being a &!+@#. All these hens have been together since day 1, and are 16 - 17 weeks old. My guess is they are trying to redo the pecking order? do I need to remove the meanie? Any tips or input would be great being that im new to chickens.