First happy T day all!!!! SO here's my issue. I have a red star hen that's almost 3. She has been in a coop with the same birds since I got her-growing up with all of them. About 2 months ago I found my SLB pullet cowering in the corner of their coop-while all the others were outside. I picked her up and saw the most horrific HOLE eaten out of her near her vent and more towards hip area-huge and deep I felt horrible as I had just visited them a few hours before. I picked her up and fluhed her wounds ( she was 3 months old at the time) I ALMOST put her down after examining her. I know how resilliant chickens can be so I kept cleaning and treating her wounds. At the time I had no idea who did it but I know once blood is shown they all could have joined in Finally, she healed over ( actually surprised me) and new feathers came in. I kept her in a large brooder cage in her coop so everyone could see her...Her hatch mom stayed on top of her cage almost every night ( bantam-lol) Anyway, It was getting time to let her back out with the group. I chose a Sat to sit and watch the pen all day-I wanted to catch the feather plucker in action. Low and behold it took about 20 minutes for me to see the red star hen go after both SLB's ( un hurt ones) in run..plucking-plucking-plucking-they couldn't run fast enough away from her. I jumped in and put her in solitary confinement within coop. Again, she could see everyone and vice versa. I let the SLB pullet out when she got locked up. Peace in the land resumed. Fast forward a month, I let the red star out a few days ago under supervision. Not one problem, until today. She started plucking out everyones feathers. That's when I knew she was the one who almost killed the brahma!. I grabbed her and put her in my larger population of older girls that WONT take crap from any bird. She was running like crazy to stay away from them...I felt bad but I wanted to teach her a lesson. She is now back in confinement-what do I do with her??? Will she stop? I've never had this problem before. They have ALOT of space in and out of the coop-treat balls that hang up-food 24/7 with water-treats almost everyday-fruits -veggies-leftovers...I dont get it? I will put her down if I have too I just don't want to. Advice?