
Kennel cough vaccine isn't usually give to baby pups, so unless you have asked for it then I doubt it has had this one, just the usual puppy vaccinations which include Para influenza, like canine flu whereas Kennel cough is like the human cold, of these there are lots of different strains, so even vaccination may be of limited use.
Unless you or the breeder have Kennel cough on the premises then there is no problem with bringing yoru pup home.