Had a bad situation about a month ago with one of our Easter Eggers was getting bullied by our five other hens (1 other EE, 2 BRs, and 2 RIRs). All of the feathers on her butt were pecked off, she was bleeding from the skin on her butt, she wouldn't go out of the coop to eat or drink much and, as a result, she was getting scrawny, which only resulted in the others going after her more. We moved her into the basement for a week so she could heel and fatten up a bit, but when we put her back in the coop, the others went after her again, and within 2 days she was as bad as she was before. I read somewhere on here that Grannick's bitter apple spray might deter the others. It has worked unbelievably well -- not only doesn't she get picked on anymore, but she's gained weight and is as healthy as she's ever been. It's been 3 weeks, I spray her tail feathers and butt three or four times every 5 or 6 days and the others haven't touched her since. Anyway, much thanks to this community for suggesting such easy and simple fixes to tough problems.