Go To Your Local Co-op / Feed Store, And Ask Them For A Bag Of Whole Corn Or Cracked Corn, Its Only A Few Dollars And It Will Last You A Long Time, Then Give Your Ducks A Hand Full Of Corn In The Morning And In The Evening. Other Than That Losts Of Fresh Water, Grass Out Side Or Greens, And Bugs. You Will Have Very Happy And Healthy Ducks, My Ducks Prefer Whole Corn.