From my understanding, there is no difference between a "1 year" and "3 year" DAPP vaccine. They are all the same. So even if you went to the non-accredited AAHA vet, that vaccine will still be good for 3 years. Maybe not according to that vets office. But DAPP is not required by law so you can kind of do what you want with it.
I personally would never give vaccines every year. And AAHA recommends every 3 years. But I'm not even sure I'm comfortable with that as I don't think that many vaccines in a lifetime are necessary at all. Rabies I will be doing per the law every 3 years.
I hope someone with more info will chime in.
