On my world, I started playing without any mods (yes, any mods). I played for a few days but after 10 days or so... it became really laggy to even play in the world. So I set my settings to the lowest point and it became less laggy but it was still lagging alot (I could barely move my mouse). I turned the mouse waiting to see what happened... there were more that a thousand sheep! I downloaded SPC to remove the mobs. The next day when I played there were a thousand pigs. I stopped playing in that world but I still have it.
