Core vaccinations are those that are essential to all dogs, no matter where they live, according to the American Animal Hospital Association. Get your dog these core vaccines according to the AAHA's recommended schedule to protect him from serious diseases like rabies, distemper and parvovirus. Not all of them are annual shots, but some are.
The Four Cores
Three of your dog's four core vaccinations are annual shots: those for distemper, adenovirus and parvovirus. While rabies is sometimes an annual shot, your dog may need the vaccine only once every three years, depending on exactly which vaccine he is administered. Start a new dog on a vaccine regimen immediately; your vet will notify you when boosters are due.