Betsy. Buttercup. Bambi. Those are not Disney characters but three of the eight female bison that live at the bison paddock in Golden Gate Park. Sarah King, the primary bison keeper, introduces me to them one afternoon. She works with fellow hoofstock fan, Jim Nappi, Curator of Hoofstock and Marsupials at the San Francisco Zoo. Nappi says he and King share a love for bison.