There seem to be quite a few people now, even some breeders and vets, practicing and recommending minimal vaccination protocols and/or titer testing instead (after the initial shots of course) but I have not read the details on it so I don’t know if it’s similar to what you do or not. But it makes some sense to me. Except around here the titer test would probably be more than the actual shot. But I guess it’s about the health not cost but still.I've changed my dog shot regimen because of shot reaction. I now vaccinate at 7 and 9 weeks and then booster at 6 months. I do not vaccinate for Leptosporosis until 6 months.