We have several roosters. They work together to keep the flock safe, and they have established a pecking order. They will sacrifice themselves to the predators for the sake of the hens. I would never say they have no use. They are valuable "watchdogs" and protectors for the flock, they add color, variety, and entertainment. Although our rooster to hen ratio is far from ideal, it has not been a problem, and we do watch it so that they don't get way out of balance. We have rehomed fourteen roosters in the past several years; extras from the flock. They are all beautiful.