I find chicken behavior quite fascinating. Thanks for sharing your knowledge!The cock to hen ratio depends on how important egg fertility is to you. As a general rule a single large breed cock can handle six or eight hens in his prime. Young and old cocks fewer. Add more hens and he will not get around to all of them. Keeping multiple cocks in a small flock can lead to bickering. Larger flocks can handle multiple cocks if the dominate one will allow the others to breed with hens that he doesn't favor. Serious breeders breed from pairs or trios. Not only is fertility better but they are selecting for traits. As far as the crowing goes. My limited experience is that if kept together, the dominate cock is fairly much the designated crower. The others not so much. When I've gotten rid of the crower, the next in line takes his place and becomes the crower. Just on observation with small numbers of cocks. The good news is that as a rule the Asiatics aren't nearly as noisey as most other breeds.