Ehaus, Mike at Cottonwood Creek talked about how mean the RIRs could be. He should have had that talk with you, too! Maybe you could trade her out for a New Hampshire? I hear they do better with mixed flocks.
My Dellies are kind of like that. Definitely at the top of the pecking order, and the Dels lower in rank seem particularly bad about picking on the three Buff Brahmas and the Chantecler I have in there. I'm not sure I will even try to introduce my baby Orloffs into that situation, actually thinking about getting them established elsewhere and then bringing in the all the Buff birds so they can have a reprieve.