Mouse is dismayed to step outside her house one morning only to discover a giant pile of poo! Who could have done such a dastardly deed? Mouse questions all the animals of the forest, but it’s too big to be Squirrel’s, too dark to be Coyote’s, and too messy to be Deer’s. Will Mouse ever track down the culprit—and will she find a way to make the best of this smelly situation? Between giggles at every mention of the word poo, children will learn to identify eight different animals’ scat and discover how droppings can help plants to grow, all while enjoying Katelyn Aronson’s rhyming text and Stephanie Laberis’s expressive animals. Back matter includes a mini “poo-dunit” mystery challenging children to match scat with the correct animal, as well as a note on why poo is precious—and who is responsible for the biggest poo of all.