Pigs are one of THE most smartest creatures on earth. In fact, they are genetically very similar to humans and many organs and such are almost identical. They are also one of the hairless animals like humans. My sister in law keeps a pig as a pet, contrary to popular belief they are VERY clean animals more so then dogs or even cats.  I'm a Vegetarian, since it's healthy and much more tasty in my opinions to eat veggies then meat. But whatever. They're VERY clean animals who like to wallow in their own shi#. :D Pigs are filthy animals.