Pig in the dock

Medieval animal trials: Why they’re not quite as crazy as they sound. - Slate Magazine

A sample from this interesting article:

Such a case might seem bizarre to modern observers, but animal trials were commonplace public events in medieval and early modern Europe. Pigs, cows, goats, horses, and dogs that allegedly broke the law were routinely subjected to the same legal proceedings as humans. In a court of law, they were treated as persons. These somber affairs, which always adhered to the strictest legal procedures, reveal a bygone mentality according to which some animals possessed moral agency.

Scholars who have explored animals on trial generally avoid addressing this mentality. Instead, they’ve situated animal trials in several sensible (and academically safer) frameworks. The dominant explanation from legal scholars and historians is that, in a society of people who believed deeply in a divinely determined order of being, with humans at the top, any disruption of God’s hierarchy had to be visibly restored with a formal event. Another hypothesis is that animal trials may have provided authorities an opportunity to intimidate the owners of animals—especially pigs—who ran roughshod through the commons. A sow hanging from the gallows was, in essence, a public service announcement saying, Control your pigs or they’ll die sooner than you hoped.