Who Broke the Vase?

In a cottage in the woods lived an elephant, a monkey, a bear, and a pig. They were best friends. Each animal would leave home every day for work. Before exiting for work, they were sure to clean their house, leaving not a crumb on the floor. One day after returning home from work, they discovered their favorite vase was scattered in pieces on the floor. Puzzled by the mystery, each animal started to blame one another. After accusing one another, they made an amazing discovery.