Sometimes a couple of Mallards are necessary: My ducks hated cracked corn! Even when i mixed cracked corn with pellets, the ate the pellets and spat the corn out. Until the mallards came and went bonkers for cracked corn. Now my ducks devour cracked corn, so that the Mallards can't eat it. Cracked corn is now more valuable than cat-food - except for Blanca Duck who even chewed through the thick paper bag to get to the cat-food…They are hesitant with new things. Eventually someone will try a bite then everybody else will join in.