S.D. Codified Laws § 10-45-18.3
There are hereby specifically exempted from the provisions of this chapter and from the computation of the amount of tax imposed by it, gross receipts from the sale of feed and bedding for cattle, buffalo, sheep, goats, swine, pheasants, partridges, quail, poultry, ostriches, emus, rheas, and domesticated fur-bearing animals defined in chapter 40-35, if such feed or bedding is used by farmers or ranchers who are regularly engaged in the business of raising and feeding such animals, or producing milk for sale for human consumption, and horses and other animals within the family equidae. The term, poultry, does not include any fowl other than domestic fowl kept and raised for the market or the production of eggs for human consumption. The term, bedding, only includes straw, corn stover, and bean straw.
SDCL 10-45-18.3