Simple to implement but more consistent animal behaviour

Like how sheep eat. Grass, cows should eat wheat, chickens should eat freshly planted seeds and pigs should try to eat EVERYTHING. They could also walk to the dropped versions of these entities on the ground like when a player holds them to allow for more dynamic behavior and emergent gameplay.

Could be much easier to organise animals of all sorts by chucking their favourite food on the ground and watching them go for it! Might be a fun way to distract zombies, giving rotting flesh more use.