“A cock was tried in Basel for having laid an egg. It was condemned to death, and both cock and egg were burnt at the stake on a hill called the Kohlenberg, with all due ceremony, witnessed by an immense crowd. The fatal cockatrice, which was supposed to issue a cock’s egg when hatched, could be used for contacting the evil spirits, so the cock which gave it birth was dreaded as dangerous purveyor to His satanic Majesty. Animals were frequently executed for various offences in medieval times. “
So, basically, things are much much less silly now.