What they were emphatically not doing, said Jay Platt, the third-generation proprietor of the ranch, was abiding by a federally recommended livestock identification plan, intended to speed the tracing of animal diseases, that has caused an uproar among ranchers. They were not attaching the recommended tags with microchips that would allow the computerized recording of livestock movements from birth to the slaughterhouse.

“This plan is expensive, it’s intrusive, and there’s no need for it,” Mr. Platt said.

Oklahoma is now mandating Premises ID for anyone wanting participate in the Swine Shows. One more tricky little way that they make “voluntary” into mandatory.