Will Falconer, DVM Moderator
If you don't believe the immunologist's data on duration of immunity, I guess you keep vaccinating repeatedly and hope for the best, Mandy. But if you've "had no problem" at every few years, might you also at every five years? Or stopping at age six? Might be worth a try…
We tend to "fear the germ" when I think it makes far more sense to bolster the dogs' defenses. And there are better ways than vaccines to do that. Nutrition, dropping the poisons for fleas, heartworm, etc, and lessening or dropping the vaccinations.