Sheep
The seep has 5 hearts. It does not attack you and it drops one block of wool. There is a 10% chance that it will not drop any wool. You can collect 2-4 blocks of wool and not killing the sheep by right-clicking with a shear on your hand. It drops about 3 experience orbs. If you right click with a dye on a sheep that is not sheared, it would change it's color depending on what kind of dye you used. For example, if you use blue dye, the sheep's white wool will become blue.