Okay, so if you have a little kitchen scale, a jumbo chix egg is 2.5 oz or larger. A regular size duck egg is well over that, so you have to do a little math. If you get gigormous ones like we do, ducks that is, well over 5 oz and double yolkers, obviously it's one duck per two chix. We made a vegie and cheese quiche the other nite with duck eggs, and wow, what a difference. Very rich, we could only eat one slice each. Super yummy. Think sometimes people's aversion is that the ducks like to "hide" their eggs sometimes, and they are quite dirty and need to be washed and smell like poo, but once they're washed and dried and put in the fridge, what's the dif? Duck eggs are higher in cholesterol, but have many vitamins and minerals that you will not find in chicken eggs, not matter what you feed them. We like to add a little cracked corn to our feed mix, makes the yolks super orange, but can affect Pekin feather coloring (may get yellow feathers), and especially in winter for ducks and chix alike, corn provides body heat. There's nothing like a sunny side up or soft boiled duck egg to dip your toast into, if you're into that. Huge difference, especially with fresh baked bread. Yummmm, know what I'm having for supper!