I am going to echo what everyone else has already said. People will want to go out and get a little Pedro or Fifi, or whatever the dog's names are in the movie, without any real thought on what the responsibilities are in raising a chihuahua. Backyard breeders and puppy mills will see dollar signs and make chihuahuas available by the hundreds and some are bound to end up in homes that are not right for them, or worse at shelters when they cannot find buyers and the byb, dog stores, and mills are no longer willing to pay for the expenses of dogs that won't make them any money.