The Cynic exhortation to live according to nature is far from transparent. I defend a traditional interpretation: to live in accordance with nature is to live in accordance with human nature, which is to live as a rational animal. After discussing methodological concerns, I consider the theriophilic proposal that the ideal Cynic lives like an animal. I marshal evidence against this view and in favor of the alternative of Cynics as rational animals. Finally, I anticipate and address the concern that mine is an unduly idealized and Stoicized account.