Iowa Code § 166A.7

Animals may be sold for slaughter without dipping. Sheep when inspected at the market or dealer’s premises and found free of scabies or no known exposure thereto, may be sold for slaughter purposes without dipping if consigned directly and immediately on a slaughter affidavit to a slaughtering establishment operating under federal, state or municipal meat inspection service. Such sheep shall be identified with the letter “K” in red branding paint at least four inches high on their back except those consigned to such slaughtering establishment by the original owner.