S.D. Codified Laws § 40-15-19
Every livestock auction agency shall be provided with inspection and examination to determine evidence of disease in any livestock handled on the premises. Such examination and inspection shall be made by a veterinarian who has been recommended by the livestock auction agency to be examined and inspected and employed by the Animal Industry Board, and with the approval of the veterinarian in charge of the animal disease eradication branch of the United States Department of Agriculture, and at any livestock auction agency which is engaged in the interstate shipment of livestock. Such veterinarian shall be a local veterinarian, or a veterinarian of the vicinity, accredited, capable, and qualified, unless there is no such veterinarian available. If the livestock auction agency fails to recommend such a veterinarian within a reasonable time, the board may after ten days' notice to such agency appoint such a veterinarian. In the event of a temporary absence or in the event that a sale is too large for one veterinarian to properly handle, the veterinarian so employed may employ an assistant who shall be a licensed veterinarian of the State of South Dakota and qualified as above. A violation of this section is a petty offense.
SDCL 40-15-19