(WPXI) – There is a new warning issued for pet owners after a mystery respiratory illness was discovered. Officials say that it affects dogs and is spreading across the country. The illness is very contagious and can be deadly, veterinarians say. According reports, the most reported symptoms are similar to kennel cough, which includes coughing, sneezing, nasal and/or eye discharges, and lethargy. It was reported first in Oregon in August and Oregon’s Department of Agriculture received over a hundred reports from vets regarding the illness. Vets are recommending that pet owners avoid dog parks or letting their pets hang out with dogs they don’t know. They also suggest avoiding boarding your pets this holiday season if you can.