AdvertisementDog Flu Virus Spreading Across The United StatesJanuary 29, 2016Rob SteinfacebookEmailKelli Fabick of Ellisville, Mo., held her mother's Australian silky terrier, Zoey, as veterinarian Sarah Hormuth gave the dog a flu shot last April. The dog flu strain H3N2 is now circulating in more than two dozen U.S. states. (TNS via Getty Images)