I went to the feed store today to look at the new chicks that came in. There was an elderly lady picking out chicks from the straight runs. She would grab a chick and look at it's face and say "that's a rooster" then pick up another one and say that's a rooster, too" After about six or seven she lamented, " are they all rosters?" I couldn't help myself, I leaned over close to her and asked her how she knew by looking at their faces. She looked at me rather irritated and didn't answer. Not to give up that easily, I said, "are you going by the expression on their faces?" She was amused by my question and she smiled (my intention all along) and said, "no, I'm looking at the combs, the boys' usually have a bigger comb, but not always." I can't argue with that...like was said, works 50% of the time! LOL