@Tfmonkey Regarding chicken breeding: keep in mind that most farmers cull out very aggressive and territorial roosters for the farmer's benefit, not the chickens' benefit. Fierce roosters are assholes. They'll still keep about 1 rooster for every 10-15 hens, but they intentionally allow the most docile birds to live (for egg or meat production). If they're raising show birds, it's more about looks. It's like raising seedless orange trees: Terrible for the species, great for the farmer.