Lex Talionis

http://books.google.com/books?id=Jg0xAAAAIAAJ&pg=PA1&dq=%22The+Criminal+Prosecution+and+Capital+Punishment+of+Animals%22#PPR2,M1

In 1386, the tribunal of Falaise sentenced a sow to be mangled and maimed in the head and forelegs, and then to be hanged, for having torn the face and arms of a child and thus caused its death. … As if to make the travesty of justice complete, the sow was dressed in man’s clothes and executed on the public square near the city-hall at an expense to the state of ten sous and ten deniers, besides a pair of gloves to the hangman.

— E.P. Evans, The Criminal Prosecution and Capital Punishment of Animals, 1906