My red sex link, who has always been docile, has gotten very nasty to her coop-mates. Even when free in the yard, she has "attacked" the other hens, usually going for the neck. I would almost think she was behaving like a rooster except she sure looks like a hen. She will be 6 months old in about a week and is not laying yet. Could she be getting nasty because she is about to start laying?
Derby
Derby