I've done a lot of research on feather-pulling, but I'm still not totally sure what to do. At first I thought I had a flock-wide problem, but it seems like just one chick is doing most of the damage to my sweet little EEs. (FYI, I have 28 five-week-old chicks, who share a 10 by 10 foot coop during the day and a smaller brooder at night. The coop has plenty of natural light, pine shavings for bedding, chick starter and treats -- zuchs and cukes -- in it.) Anyway, this one RIR pullet, 5 weeks old, just can't stop pulling the other chicks' feathers. When I see her go after one, I'll swat her away, or pick her up and hold her upside down to calm her down, but as SOON as I put her down, BOOM, she's chasing after another chick and yanking out its feathers. Now, the other chicks at this point are jockeying for pecking order a bit, deciding who gets to sit on the highest perch and when... and the three young roos get into wing-beating, rush-at-each-other hissy fits every once in a while, but I think that's normal . Whereas this one little freakish chick is just addicted to everybody's feathers. (I've nicknamed her "Satan," with her red feathers and evil personality. By the way, she's incredibly sweet to people. Figures!) So the question is: what do I do? Should I give her away to someone with older birds that she's less likely to pick on? Is there some way to re-train her, or are some chickens just straight-up mean? Since the rest of the flock seems pretty okay, I don't think it's a protein or a boredom problem... any advice is appreciated.