I'm sorry they are sick. Could it be tonsilitis? Dogs can catch it from people and they will cough and hack. I don't know if all vets think of tonsilitis. One of my friends digs gets it about once a year     
				__________________  ~Magnifique Yorkies~  Purchasing from backyard breeders, pet shops, and puppymills perpetuates the suffering of other dogs. 
Educate yourself and buy from reputable breeders or rescue.      |