OCEAN CITY, NJ - APRIL 19: Dustin Baker, of Lancaster, Pennsylvania, holds his Mexican Hairless Rat named Chiquita, as they attend the Woofin' Paws Easter Pet Parade and Fashion Show April 19, 2003 in Ocean City, New Jersey. Approximately 65 cats, dogs, guinea pigs, rabbits and Chiquita competed in swimsuit, best dressed, best tail wagging, best Easter bonnet and best of show categories for a first, second, or third place ribbon. (Photo by William Thomas Cain/Getty Images)

Some guy shot video of himself letting his pet rat clean his teeth.  He stands next to the cage with his mouth open as the rat picks bits of food from inside of his mouth.  It even licks his teeth and gums.