 The business survives today based partly on sales of their flagship product, Nancy's Yogurt, developed from recipes of Nancy Hamren.In the 1970s, the creamery avoided bankruptcy with the help of the rock band Grateful Dead, who over time held a series of 10 benefit concerts on behalf of the creamery.The documentary film "Sunshine Daydream" was shot at the first performance August 27, 1972.