Minecraft wiki entry for Fox, associated text: When sweet berries or glow berries are used on two foxes, the foxes breed, producing a baby fox. The baby fox trusts the player that bred it and does not flee from that player as it grows up; however, because baby foxes also follow nearby adult foxes, an adult running away from the player may cause the baby to do the same. A lead can be useful during this time to keep the baby fox from fleeing until it has finished maturing to an adult itself, or the player can simply kill the adult foxes with a ranged weapon.