I have three hens, a barred rock, a buff Orpington, and an Amaurana(sp?), an easter-egger who lays green eggs. They were were all born in March and purchased at the same time and have grown up with each other. The BOrp has always been head hen. However, in the past week my EEgger has become fractious. They will all be just pecking around in the yard and she will suddenly just run up to one of the other hens and just PECK her repeatedly around the head region. As she does this she throws up her neck feathers just like a rooster. The other hens are starting to cower a little when she comes near. I tried putting food at opposite sites in the yard but she seems determined to drive the other hens away from whatever they are eating. Any ideas out there?