The Meaning of Life, the Universe, and Everything.
If you place cauldron filled with water inside your animal farm, each animal in two block radius from cauldron receives 10% chance to drop double number of items after being slaughtered (Meat, leather, wool).
Animals are constantly moving inside farm, so sooner or later each of them will walk near the cauldron and receive this effect.
I suggest it because it is not much use of cauldron right now.
And because animals need not only to eat but to drink also