I have 7 Polish and 1 Houdan living together for a few years. Lately, the Houdan has been attacking one of my Polish. She actually tracks her down and pecks on her and will even follow her into the nesting box to peck her. If the hen jumps up on top of something, the Houdan will jump up there too, and peck at her. What's going on here? I put a pinless peeper on her. But I don't understand why she is so adamant about pecking this one hen. Any ideas?
