I have a white leghorn hen she was raised by her self for a few months then i introduced her to two new chickens. And they are black silkies. At first she would peck and chase them but I figured it was a pecking order but it has been several months and she is still doing it. She does it when they come near her. Or just because she wants do. She pulls out lots of feathers of theirs. And I feel terrible because the silkies can't roam around in there run without being scared. What can i do to fix this?