This winter your pet could be the one getting sick. An unknown and potentially deadly contagious canine respiratory illness that began in one Western state this summer now spans more than a dozen states, the nation's lead non-profit veterinary organization is reporting. As of Monday the disease had been reported in 14 states. The cause of the mysterious illness remained under investigation, American Veterinary Medical Association (AVMA) President Dr. Rena Carlson, told USA TODAY. Read more at the link in our bio.