Not quite the same thing as flying pigs.
“Explosive device hidden in dead sheep,” by Efrat Weiss for 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.