I just got my first chicks in June. Two of the twelve turned out to be roosters (1 I knew, 1 was a surprise). My Sussex crowed for the first time when he was 11 weeks. They are 15 weeks now and my Rhode Island Red hasn't crowed yet. I know it isn't extraordinarily late for him to crow, but I've heard only the dominant rooster will crow. Is this true? What have your experiences been?