What Do They Do with all the Poo from all the Animals at the Zoo?

What do they do with all the poo from all the animals at the zoo? The hippos, the tigers, the kangaroos— what do they do with all that poo? There’s so much poo at the zoo ... Where does it all go? Do they mix it into chocolate ice-cream? Sprinkle it on pizza? Stir it in the local swimming pool?! Come along in search of the stinky truth!