Puppy Vaccination Schedule Explained

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Vaccinations are one of the simplest, most effective things you can do for a new puppy. But the schedule can look confusing: multiple rounds, unfamiliar acronyms, and advice that seems to differ from vet to vet. This guide explains the standard puppy vaccination schedule used across the US, what each vaccine protects against, and why the timing matters.

Short answer: Puppies need a series of core vaccines starting at 6–8 weeks, repeated every 3–4 weeks until 16–18 weeks old, plus a rabies vaccine at 12–16 weeks as required by law. A booster follows at one year, then every 1–3 years depending on the vaccine.

By The Paw Pilot · Updated 3 November 2026 · 8 min read · Puppy health

Core vs non-core vaccines
The standard puppy vaccination schedule
Why puppies need a series — not just one shot
What to expect after vaccination
Vaccinations and socialisation: finding the balance
How much do puppy vaccinations cost?
Frequently asked questions

Core vs non-core vaccines

The American Animal Hospital Association (AAHA) divides dog vaccines into core — recommended for every dog — and non-core, recommended based on lifestyle and local risk. Your vet will tailor the non-core list to your area.

Vaccine	Type	Protects against
Distemper (CDV)	Core (in DHPP)	Canine distemper virus — often fatal, attacks respiratory, gut and nervous system
Adenovirus / hepatitis (CAV)	Core (in DHPP)	Infectious canine hepatitis and respiratory disease
Parainfluenza (CPiV)	Core (in DHPP)	A cause of kennel cough
Parvovirus (CPV)	Core (in DHPP)	Highly contagious, potentially fatal gut disease — the biggest killer of unvaccinated puppies
Rabies	Core (legally required)	Rabies virus; required by law in nearly every US state
Bordetella	Non-core	Kennel cough — recommended for dogs that board, train or socialise
Leptospirosis	Non-core	Bacterial disease spread in water and soil; can pass to people
Lyme disease	Non-core	Tick-borne disease; recommended where ticks are common
Canine influenza (H3N2/H3N8)	Non-core	Dog flu — for dogs in daycare, boarding or dog parks

The standard puppy vaccination schedule

Based on AAHA canine vaccination guidelines, a typical schedule looks like this. Your vet may adjust it slightly:

Age	Vaccines	Notes
6–8 weeks	DHPP (1st dose)	Often given by the breeder or shelter before you bring your puppy home
10–12 weeks	DHPP (2nd dose); bordetella / lepto if recommended	Non-core vaccines begin based on your vet’s risk assessment
14–16 weeks	DHPP (3rd dose)	Final puppy DHPP dose for most puppies
12–16 weeks	Rabies (1st dose)	Timing set by state law; given when the vet judges the puppy old enough
16–18 weeks	DHPP (4th dose, if needed)	AAHA advises continuing the series until 16–18 weeks in high-risk situations
12–16 months	DHPP booster + rabies booster	The important one-year booster visit
Every 1–3 years	Boosters per vaccine label and vet advice	Many core vaccines are now licensed for 3-year intervals in adults

Keep the vaccination certificate your vet gives you — boarding kennels, groomers, trainers and landlords commonly ask for it.

Never miss a booster

Timing matters with puppy shots. Try our Vaccination Schedule Reminder — enter your puppy’s birth date for a personalised shot calendar.

Open the calculators

Why puppies need a series — not just one shot

Newborn puppies receive antibodies through their mother’s first milk (colostrum). These maternal antibodies protect them early on but also block vaccines from working. Because they fade at different rates in different puppies — usually between 6 and 16 weeks — a single shot might land while maternal antibodies are still interfering. The series of boosters 3–4 weeks apart ensures at least one dose takes effect as soon as the puppy’s own immune system can respond. This is why finishing the full course, on time, matters more than any single visit.

What to expect after vaccination

Mild effects are common and usually pass within 24–48 hours:

Slight soreness or a small lump where the injection was given
Mild tiredness or a reduced appetite for a day
A low-grade fever

Call your vet promptly — or an emergency clinic — if you see facial swelling, repeated vomiting, difficulty breathing, hives, or collapse. True allergic reactions are uncommon but need immediate treatment. Keep your puppy calm and comfortable for the rest of the day after each visit.

Vaccinations and socialisation: finding the balance

The critical socialisation window closes at around 14–16 weeks — right when vaccinations are finishing. Vet behaviourists and vet schools advise safe, controlled socialisation rather than total isolation:

Do: carry your puppy in public places, invite healthy vaccinated dogs to your home, and join a well-run puppy class that requires vaccinations.
Do: expose your puppy to sounds, surfaces, people and gentle handling daily.
Avoid: dog parks, pet-shop floors and pavements in high-traffic dog areas until a week after the final puppy shots.

The American Veterinary Society of Animal Behavior notes that the risk of behaviour problems from missing socialisation outweighs the small disease risk of careful, controlled exposure.

How much do puppy vaccinations cost?

Prices vary by region and clinic, but these US ranges are typical:

Visit / service	Typical cost (USD)
Wellness exam + DHPP per visit	$75–$150
Rabies vaccine	$25–$50
Each non-core vaccine (bordetella, lepto, Lyme, flu)	$30–$60
Full first-year puppy package (all visits)	$200–$500

Many shelters, humane societies and community clinics run low-cost vaccination days — worth asking about if cost is a concern. Never skip vaccines to save money; treating parvovirus can cost thousands.

Frequently asked questions

Can I walk my puppy before vaccinations are finished?
Stick to low-risk outings: carry your puppy or walk in areas with little dog traffic, such as your own garden. Avoid dog parks and busy pavements until about a week after the final puppy vaccinations.

What if I miss a booster appointment?
Call your vet and rebook as soon as possible — don’t restart the whole series unless your vet advises it. A short delay is far better than skipping the dose.

Do indoor dogs still need vaccinating?
Yes. Parvovirus can travel indoors on shoes and clothing, and rabies vaccination is legally required regardless of lifestyle.

Are antibody titre tests an alternative to boosters?
Titre testing can show whether protection remains for some core diseases, and some owners use it to avoid over-vaccination. It doesn’t replace the puppy series or legally required rabies boosters — discuss it with your vet.

Is the rabies vaccine really required by law?
In nearly every US state, yes — for dogs, and often cats too. Requirements differ by state and county, so check local rules and keep the certificate somewhere safe.

Related guides

Disclaimer: The Paw Pilot guides are for general information only and are not a substitute for advice from your vet. Vaccine schedules should always be tailored to your puppy by your vet — if your puppy shows swelling, vomiting or breathing difficulty after a vaccination, seek veterinary care immediately.