latest animals ought to drop useful items upon death.

The cow is one of the best mobs in the game (to me), it drops food and a crafting item that has many uses, and it can grant milk. Here are three features all in one mob, which is very good. Unlike most of the latest mobs which drop nothing at all, this gives me no incentive to find these mobs, I would like to see them drop either useful items or unique ones upon death, so I can find them and then farm them, which is (to me) one of the major parts of the game.