Possible Cow

This doesn't exist in Minecraft; it's just fiction

Possible Cows or Possible Cattles are Passive Mobs found in the Possible World. They are like Regular Cows but they are Purple. They are the primary source of leather (purple dyed), milk and raw beef.

Appearance
Cows have black/purple skin with white spots. All cows have a pair of horns on their head.

Behavior
Like the Cows and Mooshrooms, Possible Cows roam in the Overworld, usually in herds of 4 to 10 (however it is not uncommon to find a lone cow). They tend to walk around slowly and aimlessly, mooing, but they will flee and jump wildly if attacked. They also tend to jump off high cliffs (and die in the process). Possible Cattles make no attempt to stay out of water and will follow the player when he/she is holding Possible Stalk, which is used for breeding.

Breeding
Unlike Regular Cows and Mooshrooms, Possible Cattles can be bred or can follow the Possible Stalks.  The parent cows have a delay of 5 minutes until they can breed again. Calves will follow their parents or other adult cows until they're fully grown. A calf looks similar to an adult cow, but its body is smaller while the head remains the normal size of a full adult possible cow.

Possible Calves move faster and take 20 minutes to fully grow. They do not drop anything when killed.

Farming
Trapping a herd of possible cows in an enclosed area and breeding them is beneficial to the player. Possible Cows drop more types of useful resources than all other passive mobs.