Denver7: Colorado veterinarians warn of rampant respiratory infections, pneumonia among dogs
VIDEO: "I would say [there's been] maybe a 50 percent increase in the number of coughing dogs we detect," said Dr. Amanda Cavanagh. "We determine these are contagious dogs. They've had exposure, and they could pass it on to other dogs." She said the virus seems to be spreading at social places for pups, like dog parks and doggy day cares.