I see your point ,make no mistake. You mention dogs ,I would not get rid of my dogs who shows signs of protecting us ,there are certain behaviors like growling and such that's considered to be the dog's job. This rooster only shows signs ,not harming us ,such as squaking at us at times or puffing up feathers at times when we approach his girls.The mean behavior toward the one hen (or roo?) ... I need to know if ALL of this new and recent behavior is becasue this silkie may be a roo and so its a dominance thing? ( remember he does no harm at all to the other girls. I do however like knowing he protects the flock!! ) certainly if he turned into a nightmare to all ,yes i would not keep him so lets not get too excited here! Thank you . its only fair to all the chickens to do some investigation first to even know what or where they go if not kept. Meanwhile i can seperate again if necessary as all is well when the silkie is not in the mix ,period ! Maybe i've just answered my own question...