My Ameraucana, Feather is at the top of pecking order. She pecks and tries to pull off feathers from my Buff Orpington, Chicka constantly who WAS her challenger. By the way it looks Chicka does not challenge her anymore. Feather breaks her eggs. I use to think she would just be impatient waiting for a spot and lay where her egg would drop and break. Today I got her egg from the nesting box and saw she pecked a hole in it. I'm starting to think Feather killed one of my chicks. Will she stop this behavior? How do I stop it?