Not quite the same thing as flying pigs.

"Explosive device hidden in dead sheep," by Efrat Weiss for [1] Ynet News (thanks to James):

An IDF force operating in the West Bank on Monday morning uncovered an explosive device weighing 40 kilograms (88 pounds), which was hidden inside the corpse of a sheep.

The soldiers were led to the device by a Palestinian terrorist who was arrested and questioned by the defense establishment.

According to intelligence information, military sources believe that the device, which was found on a road near the settlement of Elon Moreh, was slated to be used in a terror attack in one of the settlements in the area – Elon Moreh, Kedumim, Itamar or Bracha.