Does anyone know if the ducks raised for their eggs in the big farms are housed mixed sex or only females like battery hens? I just bought some duck eggs from a store and put them under my broody hen. I would love them to hatch! I heard that for ducks to lay eggs they need males about, but chickens don't. Is that true? What chances do you think the eggs from the shop will be fertile? They are in the regular 6 pack, and not free range of organic. Also what breed of duck to the large scale farms raise for egg production? Thanks.