June 27, 2011
She sculpted her first butter cow for the fair in 1960, the first of 46 such creations, before she retired in 2006. Lyon also cast cows in bronze and iron. She and her husband, Joe, operated Lyon Jerseys Dairy Farm for many years, and were active in various dairy activities. Duffy is also a National Dairy Shrine Pioneer.
Her full obituary from the Des Moines register can be read here
