They could always bury them up to their necks in the desert and let the scorpions and other critters feast on them. That would be a fitting end.
Or they could bury them up to their waist and let the villagers pick up stones and throw them at them until they are bloody, broken, and quite, quite dead. I believe there are plenty of stones in that region. The established remedies (stoning) are quite bad enough I think. Besides, the Izzies wouldn’t like messing with the hogs all that much either.