i thought that too but i realized that having three female ducks is useless because ducks don't lay eggs on this game, for some reason only hens will, so for profit sake just sell one or two of your ducks and use that money to buy two hens, then you will get 5 eggs a day, and if you put a fertilized egg in the incubator, as long as you have on female and male duck, you might have a baby duckling hatch...