Our 4 mama ducks gave us 35 eggs over 10 days and we saved 28 to incubate. By day 28 of incubation, we had 20 little ducklings hatch and ready to join our backyard farm (or be sold...most will be sold). 
They are adorable and full of life!! They are only 2 days old and already enjoying the fresh air. We put up a little spot for them with a tray of water...which they are loving!!