What is the cleanest animal in the world?

Pigs are the cleanest animals in the world when given adequate living space. They keep their living areas tidy and neat with separate areas to eat, sleep and defecate.

When temperatures are hot, pigs wallow in mud to cool off, which lends to the misconception that pigs are dirty. Pigs may be the smartest of all domestic animals, including dogs, and are easily trained. Pigs also have an excellent sense of smell. They are used to search out a rare underground fungus called truffles as well as to detect drugs and land mines. Pigs enjoy exercise and run, dig in the dirt, and splash in puddles with their pen mates.