I was thinking of breeding ducks to supplement my income. I will start small with one breed. I've narrowed it down to welch harlequins or muscovys by looking at craigslist and calling local places around here where you can buy ducks. What do you think? I will let them breed on there own no incubator. I know you can sell ducklings in the spring but what about the rest of the year. If the drakes happen to mate with another breed is there any way to tell the eggs apart.Does each breed have a different size shape or color of egg? Right now I have 1 runner hen I hope she is only about a week old and 2 3 1/2 week old muscovys no idea what sex. Thank you for your input.