Hello I have a flock of 5 week old chicks. One is a bantam cochin and is most definitely a roo. Now he, being a little man, loves to run and jump at some of the other chicks. Mostly I notice it happening with the same chicks over and over. Does this mean those particular chicks are also roos? They do sort of look like roos but I can't tell yet. A couple of them will spar back with him.