►Minecraft 1.8 changed drastically the way the vanilla mobs are spawned.
►The animals no longer despawn and their spawn is based on the biome seed.
►This mod offers modders the ability to have their custom mobs spawned in a similar way than Minecraft prior to 1.8.
►Every mod will have its individual spawning list, so other mods won't interfere with the spawning settings.
Download Custom Mob Spawner