I own 4 chickens, 2 Black Australorps, 1 Rhode Island Red, and 1 golden comet. ivw had my chickens since they were young. They've grown up together since March. The Golden Comet just recently started laying eggs approximately 3 weeks ago, and just this past week, I've noticed that she's become aggressive towards one particular chicken, one of the Australorps, by pecking her on the head. I like to hold my chickens, so after I do, and I go to put the one up in the coop, the golden comet begins to attack her. I watched them closely tonight and I watched the golden comet corner the same chicken and try to peck her. My Australorp is cornering her face in the corner to protect herself and makes whining sounds whenever the golden comet approached her. My Australorp has become terrified of her. I want to know 1, how do I prevent this and help stop it, and 2, why is she only doing this to one particular chicken? Any help/advice would be GREATLY appreciated. I'm beginning to feel horrible that my chicken is having to deal with this.