I have been reading with great interest these threads where y'all are able to figure out who is a boy/girl. I have a few questions. I have a bunch of mutt chickens as I had a RIR cross roo and silkie and cochin hens. Well, we have babies that are a mix of those! I know one is a silkie as it has 5 toes, but its head 'bump' is turning reddish. Would that indicate roo? They are six weeks old. My other chicks all have red combs, and I have one other possible silkie mix whose 'bump' is also turning red. Please tell me that doesn't mean they are all boys!