I finally put my nasty RIR on time out. She's in the cage that we used to transport the hens originally, set right beside the coop. This is a new flock, all new to each other so I knew that the pecking order would have to be established but she is NASTY. Her and our BR are fine and the BR actually fights back a bit when the RIR picks on the other girls but our poor Columbian Rock and Silkie are being mercilessly bullied by her. ARGH!