I love the look of the little guys, but I'm not sure it would be easy to get some around here. I could more easily by hatching eggs, but I hear they are hard to hatch. How hard? Say you bought 6 eggs, what is an average/estimate of how many would hatch? Can they be incubated with regular duck eggs? Also, if I either bought or hatched babies, would they be fine with regular ducks? I have some Blue Swedish and I really want to get a few silver appleyard.