If he has a runny nose, with clear or white phlegm after he coughs chances are he has Kennel Cough. I'm actually going through this with my dog now. Its crazy because she is not around other dogs except my other 2 dogs which are fine plus since it has been cold lately, we do not go out for walks. She is up to date on all of her vacs. I'm not sure on how the heck she got it...its a pain in the butt having to separate her from my other 2 fur babies. I spent New Years disinfecting everything and steaming the floors in my home.
__________________  Leila  Champion  Mila |