This is a monograph on a typical variety of native Californian shamanism, the animal-impersonator. This describes the practice among the Pomo, a Northern Californian people. Despite the title 'Bear Doctor,' these shamans did not cure: they were berserkers, as befits their totem, with a license to kill up to four people per year. Topics include how they fit into Pomo Creation mythology, initiation rituals and comparisons with other Northern Californian groups.