Terry Long, CPDT-KA, is a writer, agility instructor, and behavior counselor in Long Beach, CA. She lives with four dogs and a cat and is addicted to agility and animal behavior.
AAHA recommends that adult dogs who have received those core puppy shots be revaccinated a year after the last puppy vaccinations, and every three years thereafter. This is a somewhat reduced schedule from decades ago, when most veterinarians would recommend giving all the core vaccines to every adult dog annually.