Our three hens grew up together and have been very sweet to one another. They just reached 5 months old. Rose(a RIR) started to peck Lily( an araucana) and scare her away when I give them treats!! I know this is natural, but I feel so bad for Lily, she's such a sweet and gentle one. Any ideas what I could do to soften this pecking order? Can I train Rose in some way to be nice?