I have inherited a chicken and had to put her in with my other four, one of which is actually a sister, not that she would know that! She is a really lovely hen and has already grown fond of me, but the other chickens are treating her so badly. She joined them over a week ago and still the hen pecking continues. When she is in the run, she buries her head into the corner with her htail in the air, and she is being pecked on her bum and trampled on by the other hens. When I let them out she wanders around the garden on her own, where as the other four pretty much do everything together. The 'sister' only joined the other three a couple of weeks ago, but she settled in really quick by comparison. I feel like I have a depressed chicken and wish I could do something to help. Any suggestions?