[dwerten]

sounds like kennel cough to me so i would get him in as that can lead to pneumonia as they can sneeze from kennel cough and they can get it from the vaccine and since he had the vaccine recently not sure of the incubation period but that would be my first guess so take him in and they will give you antibiotics if this is it do not wait on this as pneumonia is the next step if it is this and you do not want that

just looked it up 2-14 days so what day was the bordatella given? has your dog been around other dogs as just because they have the vaccine does not mean they cannot get it as there are different strains now and sometimes the vaccine will cause the dog to get it

check out the videos below as i provided a video for yt of kennel cough