Minecraft (Pocket Edition)
Cows are found throughout Minecraft. They are a Passive (not hostile) Mob creature. They can be killed with any block, though most efficiently with a Sword.
If you want to lead a Cow back to your ranch or farm you can do so by holding Wheat in your hot bar. The Cow will follow you. If you feed Wheat to two Cows they will enter Love Mode and spawn a calf (see Breeding).
Usage / Purpose
Cows can also be used to produce Milk. This is done by holding an empty Bucket in your inventory bar and going close to the Cow. You will be given the option to Milk the Cow. Milk is used in several crafting recipes.
Drops / Yields
Cows are available in both Survival Mode (as a naturally spawning creature), or in Creative Mode as a Spawn Cow Egg.
Raw Beef can be cooked in the Furnace in order to increase its nutritional value.