Pictures 1990 – 1999 Bittersweet Robyn Shaffer1990 ◄ Back Next ► Picture 33 of 36 Bittersweet and Robyn Shaffer at Fiesta Farm in Knoxville, TN. Robin showed Bittersweet in the beginner rider division in 1990. Bittersweet was one of the best ponies of all time.