The facts about K9-Cough K9 Cough is a highly contagious respiratory disease of dogs and is one of the most common infectious diseases of dogs. Massive outbreaks can occur. Affected dogs frequently have been exposed to infections at places where dogs gather such as at dog shows, obedience classes, parks or kennels. Anywhere. Cause K9 Cough can be caused by … Continue reading K9 Cough