SDCL § 39-14-47: Adulteration by unsafe additives.

A commercial feed shall be deemed to be adulterated if it bears or contains any added poisonous, added deleterious, or added nonnutritive substance which is unsafe within the meaning of section 406 of the Federal Food, Drug, and Cosmetic Act (other than one which is (1) a pesticide chemical in or on a raw agricultural commodity; or (2) a food additive).