Of Interest: "Around 63 percent of all U.S. households (71.1 million) are pet owners, and more than half of these households have more than one animal. The two most popular pets in most Western countries have been cats and dogs. In the United States, a 2007-2008 survey showed that dog-owning households outnumbered those owning cats, but that the total number of pet cats was higher than that of dogs. Combined reptiles are the next popular followed by birds then horses." (Source: Wikipedia)