In 1965, Mouse travelled to San Francisco, California with a group of art school friends. Settling initially in Oakland, Mouse met Alton Kelley. Kelley, a self-taught artist, had recently arrived from Virginia City, Nevada, where he had joined a group of hippies who called themselves the Red Dog Saloon gang. Upon arrival in San Francisco Kelley and other veterans of the gang renamed themselves The Family Dog, and began producing rock music dances. In 1966, when Chet Helms assumed leadership of the group and began promoting the dances at the Avalon Ballroom, Mouse and Kelley began working together to produce posters for the events. Later the pair also produced posters for promoter Bill Graham and for other events in the psychedelic community.