We had an Aracana hen that wouldn't leave the others alone. She actually seemed to "stalk" the other chickens. We threw her in the "hole", the "hole" being a medium sized chick cage. We gave her food and water and kept her in there for approx. 5 days. We'd move the little jail house back and forth between the yard and the coup at night so she'd be safe. When we finally let her out, she was bottom of the pecking order. She did well for about 2 weeks and then started stalking again. Back in the "hole" she went for another 7 days. Since we've let her out (about 3 weeks ago) she's been a good girl. Not professional advice, but just how we dealt with that nasty behaviour...and who knows how well it will work. (how DO they swallow those feathers??? Yuck!)