Will Falconer, DVM Moderator
Heavens, yes, Evelyn. At least, most will take a signed letter from me (or another vet who'd be willing to write you one). If you're in Austin, write me through my Contact page and I'll help you.
Ultimately, most groomers and kennel owners need to learn this simple fact: early life vaccinations confer lifetime immunity in almost every case. You might want to send them to read more on this site and others, and if that's not of interest to them, tell them you are leaving for more enlightened folks to spend your money on.
It's time to vote with your wallet, and tell them why you're getting ready to go elsewhere.