I brought him and our 3 yr old Border Collie to the vet. Now our 3 year old has never had the vaccine and she has not been in contact with other dogs. The last 2 or 3 days she has been coughing - it sounds like a deep hoarse cough. Then she spits up some nasty looking saliva with mucus in it. She couldn't have caught it second-hand from the vaccine but it is possible that the pup brought it from contact with the other dogs, though since it is airborne transmission, it is unlikely.
Many dogs do however carry the disease and yet show little or no signs.
Incubation period is 5-10 days before a cough is seen. If the dog coughs in response to the pressure, more than likely it's kennel cough. Treatment for the disease is usually minimal - like human viruses, it must simply run its course. Most vets treat the dog with an antibiotic to prevent secondary bacterial infections. Most good vets will tell you that there is really nothing one can do to cure the disease.