Haha! I wondered about this too! Last year i had a broody hen hatch out a chicken peep and three ducklings! I was surprised. My ducks lay whereever they feel like it so i just thought i wasnt looking hard enough. And i kept checking under the broody to be sure there werent any eggs. I never saw a one. Now i know to check IN the shavings. She buries them. Lol dh was so mad thinking i had done it on purpose! I did set duck eggs under my silkie once, but she got up the last few days and none hatched. I am going to show him this thread to prove my innocence!
