Hi Claudine,

It would be extremely uncommon for it to still be the same kennel cough infection.  I say this because I often relate kennel cough to the flu in that it’s a bacterial disease and can mutate to some degree.  Ultimately, other causes for the sounds you hear should be considered.  Heart disease, chronic lower airway disease (bronchitis), or allergies could be at play.  It could also be physiologic in that the excitement can lead to bronchoconstriction (narrowing of the airways) or inflammation in the throat area.  It may be nothing but an oral exam and chest radiographs are something your veterinarian might recommend.

All the best,

Dr. Ryan Llera