The world of Disney (as opposed to Disney World) is “peopled” by a group of cartoon animals who walk on two legs, talk intelligibly and dress stylishly. Mickey came first. Then Minnie. Add Donald Duck, Daisy Duck, and Goofy and you have five of the characters known as the Sensational Six — the superstars of the Disney universe. The sixth character joined the group on August 18, 1930 with the release of the cartoon short Chain Gang. But he was different from the other five. He walked on all fours, barked and was completely naked. He was an animal animal.
Pluto was nameless in his debut vehicle. It wasn’t until a month later and a second appearance in The Picnic that he acquired the clever name Rover. In the cartoon, Rover belongs to Minnie Mouse who brings him along on a picnic with Mickey. In a Mitt Romney moment, Mickey ties the dog to the back of the car before driving off and dragging him behind. But when the poor pooch spots a couple of frolicking rabbits, he ends up dragging the car and its mouse occupants on a merry chase.
The following year, Rover returned as Mickey’s pet with the new name Pluto the Pup. The origin of that name is the subject of argument. It was back in 1930 that the now ex-planet Pluto was discovered. Was this the source of his name? Or were both planet and dog named after the Roman god of the underworld? And then there’s that other great mystery: If Pluto’s a dog and Goofy’s a dog, why is the latter anthropomorphic and the former not? Walt remained mum.