Once they "know": they can boss everyone around, thy tend to run the show a little lol (rooster in general, not the breed). Not IMO, they are actually pretty sweet little chickensOK! Thanks everyone! The Roo is definitely the boss of all my chicks. He constantly runs around picking on the others, even my light Brahma pullet & she's 3 times his size!!!! I'm guessing it's just playful activity - right? Or will I have to separate him from the others? Are these little guys known to be aggressive? And they both fly great!