Cow

Cows are passive mobs that spawn in the Overworld. They drop 0-3 Raw Beef (Steak if it is on fire) and 0-2 Leather when killed. They can also be milked by pressing and holding the cow, or tapping the "Milk" button while holding a Bucket.

Breeding
Cows will be attracted towards equipped Wheat and if the player holds down on the cow or taps the "Feed" button while holding wheat onto adult cows, they will enter love mode. If the player does the same to another cow, they will breed.

Trivia

 * Cows were first added to Minecraft PE in 0.3.0.
 * Cows started dropping leather in 0.6.0, therefore making it possible to craft Leather-related objects.
 * A variant of the cow, Mooshroom, were added in Update 0.9.0. When sheared, they will become cows and drop multiple mushrooms.
 * Since 0.14.0, Baby Zombies can spawn on Cows, creating Cow Jockeys.