According to the Humane Society of the United States, 39 percent of U.S. households have at least one dog and 33 percent have at least one cat. Together, we own more than 77 million dogs and 93 million cats! Then there are the 12 million birds and 7 million horses, together with our tropical fish, ferrets, hamsters, gerbils, guinea pigs, lizards, snakes, turtles…you get the picture. We Americans really love our pets.