Hello, I have Khaki Campbells. The hens and the drakes are all the same age. I know they will start to lay at around 18-20 weeks. Does anyone know how long it will be before the eggs are likely to be fertile and have a good hatch rate? Also, do ducks lay "pullet eggs"--like the smaller eggs that chickens lay when they are just getting started? My ducklings are just babies, but already I have some friends who are asking for eggs to incubate to start their own flocks, and I don't know what to tell them about when I might have some good eggs for them. Thanks!