I have a 1 and a half year old rhode island red along with 5 others and 2 yet older new hampshires. Last spring i got 6 chicks and have had them separated from the others by chicken wire and a run while the others free ranged. Within the past month or so we have merged the two groups. At first things were normal with minimal pecking to establish order. More recently one of the Rhode Islands (whome we call Goose) has taken a fancy to my young white plymouth rock. She stands on top of her and pins her down while pecking and tearing at her head and neck. So far she has ripped off a chunk of an ear lobe, torn her comb and now took an almost 2 inch chunk out of the back of her neck feathers and all. My poor white plymouth rock is a white bloody mess. I have tried putting Goose in a cage with food and water for 3 days and she is more aggressive than ever. Today she attacked 3 of the younger girls one after another on a rampage. Im out of things to do. I need help now!!