Minecraft wiki entry for Surviving_in_a_single_area_indefinitely, associated text: Another great way to obtain infinite supplies such as food, wool, leather, and other passive mob drops is to create a Mob Farm. First, create a penned in area with fences and fence gates. Then, lure two of each species you want into the pen using their preferred food item (such as carrots for pigs, wheat for sheep and cows, seeds for chickens, etc.). Once you have two of each mob you want, you can breed them at any time you want- provided the parents have a five-minute cooldown period. You can slaughter the mobs at any time, just bear a couple of things in mind. First, to kill any passive Overworld Mob in one hit, use at least a stone axe and jump before attacking to critical hit. Second, remember to keep at least two of each animal so you can use them for breeding and supplies infinitely.