Vaccines are the foundation of a long, healthy life for your dog, protecting against diseases that were once routine killers of puppies. This guide lays out a clear vaccination schedule from the first puppy shot through adult boosters, explains the difference between core and non-core vaccines, and reflects the framework used in the AAHA canine vaccination guidelines and AVMA recommendations. Use it to understand the plan — then build the actual schedule with your veterinarian, who tailors it to your dog’s breed, location and lifestyle.
Two ideas make the whole schedule make sense. First, puppies are born with temporary protection (maternal antibodies) from their mother’s milk that fades unpredictably over their first months — and can block a vaccine from “taking” until it’s gone. That’s why the puppy series is repeated several times rather than given once. Second, vaccines are split into core (for every dog) and non-core (based on risk). Getting both right is central to good preventive dog care.
Core vaccines every dog needs
Core vaccines protect against diseases that are widespread, often fatal, or dangerous to humans. For dogs these are distemper, adenovirus (infectious hepatitis), parvovirus and parainfluenza — usually bundled into a single combination shot abbreviated DHPP (sometimes DA2PP) — plus rabies, which is legally mandated in most regions because it is fatal and transmissible to people. Parvovirus and distemper in particular are devastating in unvaccinated puppies, which is exactly why the schedule front-loads protection in the first months of life. The AAHA and AVMA consider these vaccines essential for virtually every dog regardless of lifestyle.
The puppy series, step by step
Because maternal antibodies fade at different times in different puppies, no single early shot can be trusted to protect, so the core series is repeated. A typical plan begins DHPP at 6–8 weeks, then boosts every 2–4 weeks until the puppy is at least 16 weeks old — usually three or four DHPP doses in all. Rabies is given once at around 12–16 weeks depending on local law. Finishing the series no earlier than 16 weeks matters: vaccinate too early and lingering maternal antibodies can neutralize the vaccine before it builds lasting immunity. Until the series is complete, keep your puppy away from unvaccinated dogs and high-risk areas, a key point in our puppy socialization guide, which explains how to socialize safely during this window.
Schedule at a glance
| Age | Core vaccine | Notes |
|---|---|---|
| 6–8 weeks | DHPP #1 | First of the puppy series |
| 10–12 weeks | DHPP #2 | Non-core (e.g. Bordetella) may begin here |
| 12–16 weeks | Rabies | Timing set by local law |
| 16+ weeks | DHPP final dose | Completes the puppy series |
| ~1 year | DHPP + rabies booster | First adult booster |
| Adult | Core boosters | Every 1–3 years per product & law |
Non-core vaccines and lifestyle
Non-core vaccines are recommended selectively, based on where your dog lives and what it does. Common ones include leptospirosis (spread through wildlife urine and standing water, and transmissible to people), Bordetella and canine parainfluenza (kennel cough, important for dogs that board, attend daycare or visit dog parks), Lyme disease (for dogs in tick-heavy regions), and canine influenza. Your veterinarian weighs your dog’s exposure against the benefit of each. A city dog that frequents grooming and boarding facilities has a very different non-core list from a rural dog that rarely meets others — which is the whole point of the core/non-core split.
Adult boosters and titers
After the one-year booster, core vaccines are generally repeated every one to three years depending on the specific product and your vet’s protocol, with rabies boosters following local law. Some owners and vets use antibody titer testing to gauge whether protection from distemper, adenovirus and parvovirus is still adequate before automatically reboosting; rabies, however, is governed by law rather than titers. Mild, transient soreness or a day of low energy after a shot is common and usually harmless, but contact your vet promptly if you see facial swelling, hives, vomiting or breathing trouble, which can signal a rare allergic reaction. As with everything here, the right cadence for your individual dog is a conversation to have at the clinic.
Frequently Asked Questions
What are the core vaccines for dogs?
The core canine vaccines are distemper, adenovirus (hepatitis), parvovirus and parainfluenza (combined as DHPP), plus rabies, which is also legally required in most places. They protect against diseases that are widespread, severe, or transmissible to people, so nearly every dog should receive them.
When should a puppy start vaccinations?
Puppies typically begin their core DHPP series at 6 to 8 weeks of age, then receive boosters every 2 to 4 weeks until they are at least 16 weeks old. This staggered schedule overcomes waning maternal antibodies that can otherwise block an early vaccine from working.
How often do adult dogs need boosters?
After the puppy series and a booster about one year later, core vaccines are generally boosted every one to three years depending on the product and your vet’s protocol. Rabies follows local law. Non-core vaccines like leptospirosis or Bordetella are often given annually based on exposure risk.
What is the difference between core and non-core vaccines?
Core vaccines are recommended for all dogs because the diseases are dangerous and common. Non-core vaccines, such as leptospirosis, Lyme, Bordetella and canine influenza, are given based on a dog’s lifestyle, geography and exposure risk. Your veterinarian tailors the non-core list to your dog.
Sources
- AAHA — 2022 AAHA Canine Vaccination Guidelines
- AVMA — Vaccinations & Pet Owner Resources
- American Kennel Club (AKC) — Puppy Shots: A Complete Guide
- ASPCA — General Dog Care