The Mad Cow is a cow based Monster in Sleepless Hollow that walks in a straight line until it hits a wall, upon which it turns in a random direction. As its life is depleted, it moves faster, like a Triceroid. Mad Cows can destroy clumps of hay by bumping into them, and doing so will increase their life.
The Extremely Mad Cow is similar but does not move and breathes fire until Bouapha pushes a clump of hay into it, which will make it turn into an Annoyed Cow (identical to a Mad Cow other than name). If the Extremely Mad Cow sets hay on fire, the hay will turn into a short-lasting flame that damages Bouapha.