There's a glitch in the 11th level where if you put a larger sheep on top of the chimney (Keep the chimney in the original angle and Shirley is larger than Shaun and Shaun is larger than Timmy) and then jump a smaller sheep into the chimney, the smaller sheep will go inside the larger sheep and if you take control of the larger sheep, you can jump as many times as you want carrying the smaller sheep inside of the larger one and you can do the same with meduim sheep