I have 15 roosters but I have this one rooster ( a buff orp.) that all the other roosters attack and run him off as soon as i let them out in the morning. There will be 5 to 8 roosters pinning him to the ground and they act like they are mating with him. He is around 8 months old with large comb and wattles and has never laid an egg. I dont think i have ever heard him crow though.