Okay, I understand all about pecking order with hens, and why cannibalism can occur. But I'm am baffled by a recent change in the behavior of one of my hens. For several weeks now, Coco, a black hen who is the third smallest of the four, has been attacking Butterscotch, one of the two large red hens (they easily outweigh the offender by double). Coco only singles out Butterscotch, going after her head and sometimes draws blood on her comb. Butterscotch is now intimidated by Coco and avoids her. These hens are all about 10 months old, and were all raised as chicks by us, so it's not like they are new to eachother. None of them seems sick and egg production has not dropped off. Any ideas about what's going on here? I'm wondering if I should separate the offender from the rest of the group.