...but do you think otherwise? We have a group of chicks that are approximately at least 12 weeks old. I can tell definitely that some are roos, but this one is a mystery... Meet Blueberry. S/he is a blue Cochin bantam, at least I think so. I know for sure s/he is a bantam. Here s/he is compared to the others: So, what do you think? Is s/he just a late bloomer cockerel, or a more masculine hen? I'm leaning toward roo, but I'm not sure.