Cough

Mark it could be kennel cough. vaccinated or not. We had a bad case go throuhg my whole kennel a couple of years back and now that you mention I think Im gonna purchase a tray of vaccines and get busy. It can help but does not cure it or completely prevent it. it takes about twoo weeks to run it's course but took nearly 6 weeks from start to finish with all my dogs, very frustrating

Dry dusty conditions can cause irritations some dogs are similiar to people with allergies.

one other thing that comes to mind is upper respiratory infection.

these are only suggestions and can only be diagnosed by a vetrinarian