Minecraft wiki entry for End_survival, associated text: Building farms on the outer End Islands has several advantages, the biggest being safety from being destroyed by the Ender Dragon. If the player is seeking to colonize the outer End Islands, they will need to take many difficult steps to get animals and villagers there. Pigs are under a block tall, and can be pushed/lured up a staircase or elevator to the End gateway to be pushed through to the other side. For other mobs such as cows, Villagers and sheep, the player will have to push baby versions of the mobs through the gateway. Building a flying machine out of sticky pistons and slime blocks has several advantages, such as being able to transport adult mobs and able to cover far greater distances than End Gateways (the flying machine will keep journeying through the void forever unless it collides with something or is broken en route by the player, and can be built high above the end's tallest structures to avoid collisions. If wanted, a player could take flying machines with villagers and animals millions of blocks away from the center, making for great secret bases on servers).