Got a donated beautiful adult Sumatra roo and he gets along with all my hens (5 Delaware, 6 B. Orps) except one Del whom he attacks until she is coops herself up and is afraid to come out. This Del is not the smallest of the flock and has always been the first to come to me, hang and hunt while I rake inside the run, would jump on my arm and hang, and seemed to get along as she is not low in the pecking order... at least as far as I can tell. She was also the first to challenge him when I introduced him into the flock. She beat up on him, but he came back bested her and she capitulated, but he has not stopped there. I saw her being chased by Charlie Chan (the roo) yesterday and threw herself on the ground and spread her wings, he jumped on her, lots of squawking, and then another Delaware pecked him off of her. Another chicken behavour mystery to me. I have "stepped into the ring" and interfered by showing Charlie that I'm the Head Roo by cornering him, but when I turn my back... She's been my fav, so I have a soft spot for this little hen that kept running up to my hand at the feed store where I got them. Any suggestion? Will they work it out?