yup, ours dogs get a parvo shot as pups, and after that no more at all, even after Happys vaccines were counteracted, several years later we did her titre tests and her antibody levels were exellent. we had to have her vaccins counteracted in the first place because they made her very very sick. her Rabies Vaccine pretty much ruined her life, we are still working on getting her over the effects from that thing.(dont ask long story, and I am getting tired of explaining what happend with that so to make a long story short, she went from a happy, friendly, bouncy,well socalized puppy, and after her rabies shot, in just enugh time for it to kick in, she was all of a sudden terrified of everyone and everything, this soon turned into aggression, and well it has taken a LOT of work to fix the problem, which is still not fully fixed) by the way this type of reaction to the rabies vax has apparently happend to other dogs as well as I found out from someone else lol. that is why we turned away from vaccines, we dont want to needlessly risk this happening again. also the RAW diet acts in the same way as the vaccines, by building up immunity, by being exposed to the problem, exept that it is a natural way.