A puppy vaccination schedule is a series of doses given every two to four weeks, starting at six to eight weeks old and continuing to at least sixteen weeks, followed by boosters. The series protects against distemper, parvovirus, hepatitis, parainfluenza and rabies. This guide explains how that schedule works, what each vaccine is for, and which decisions belong with your veterinarian.
Nothing here replaces an examination for your dog. If your puppy is sick today, has reacted to a vaccine before, or has a health condition, talk to your vet before the appointment rather than after.
General information, last reviewed for 2026. Core and non-core designations follow the American Animal Hospital Association (AAHA) canine vaccination guidelines; rabies rules are set locally and change often.
Table of Contents
- Puppy Vaccination Schedule at a Glance
- Which Vaccines Does a Puppy Usually Need?
- When Does a Puppy Get Each Vaccine?
- Puppy Vaccination Schedule Explained by Age
- What If a Puppy Is Late or Misses a Vaccine?
- What Side Effects Are Normal, and When Should You Call?
- How to Prepare for Your Puppy’s Vaccination Appointments
- Frequently Asked Questions
- What to Do First
Puppy Vaccination Schedule at a Glance
Most puppies need three or four veterinary visits between six and sixteen weeks, then a booster about a year later. Here is the shape of it:
| Age | Core vaccines | Non-core (risk-based) vaccines |
|---|---|---|
| 6-8 weeks | DHPP (first dose) | None usually, unless exposure risk is already known |
| 10-12 weeks | DHPP second dose, rabies first dose (local law sets the age) | Bordetella, leptospirosis, Lyme, canine influenza if indicated |
| 14-16 weeks | DHPP third dose, rabies second dose if the first was given before 16 weeks | Second doses of any non-core vaccines given earlier |
| About 1 year | DHPP and rabies boosters | Annual boosters where risk continues |
| After that | DHPP every three years, rabies every one to three years by law | Leptospirosis, influenza, Lyme yearly; Bordetella every six months for boarding |
Two things change that picture: the puppy’s age on the day you start, and what your puppy actually meets. A litter raised in a clean home has a very different risk profile from a puppy rescued from a shelter outbreak or a working dog on farmland.
Which Vaccines Does a Puppy Usually Need?
Veterinarians split vaccines into two groups. The core group is recommended for every dog, everywhere. The non-core group depends on your puppy’s lifestyle and the diseases in your region.
Core vaccines: the ones almost every puppy gets
DHPP is the combination most dogs receive first, and the letters tell you what is inside: distemper, hepatitis (adenovirus), parainfluenza and parvovirus. You will also see it written as DAPP, DAP or DHLPP, depending on the manufacturer. When it includes leptospirosis, the extra L shows up in the name.
- Canine distemper – a highly contagious virus that affects the lungs, skin and nervous system, and is often fatal in unvaccinated puppies.
- Parvovirus – survives in soil and grass for months and causes severe vomiting and diarrhea. It is the disease most owners have heard about, and for good reason.
- Adenovirus, or infectious canine hepatitis – targets the liver, kidneys and eyes.
- Parainfluenza – one of the main viruses behind kennel cough.
Rabies is the second core vaccine and the only one with legal force. Most jurisdictions require vaccination by a set age, and many also require proof for licensing, boarding, travel and grooming. Some states and countries set a minimum age of 15 or 16 weeks, so a rabies shot given too early may not legally count.
Non-core vaccines: decided by risk, not by ranking
These are not lesser vaccines. They are vaccines that cost money and effort, so they get recommended when the chance of exposure justifies both.
- Bordetella (kennel cough) – usually added for puppies heading to daycare, boarding, grooming or dog parks, where respiratory disease spreads fastest.
- Leptospirosis – worth discussing when a dog swims in standing water, hunts, or lives near wildlife or livestock.
- Lyme disease – relevant in tick-heavy regions and for dogs that roam in tall grass.
- Canine influenza – strains H3N8 and H3N2 circulate in some areas and in high-contact settings such as shelters and shows.
When Does a Puppy Get Each Vaccine?
The first visit usually happens between six and eight weeks, and later doses follow every two to four weeks until the series ends around sixteen weeks. After that comes a booster at about one year, then longer intervals for the core vaccines.
The reason for the repeats is maternal antibodies. Puppies absorb protective antibodies through colostrum in their first days of life, and those antibodies block a vaccine from working until they fade. That fade happens on a different clock in every litter, which is why one eight-week-old puppy is protected by a single dose and another needs three. The dose at sixteen weeks exists to catch the puppies whose own immunity still had not kicked in by then.
Protection is not instant. Most dogs need roughly one to two weeks after the final dose of a series to build solid immunity, which is the single fact that decides the second half of the first year: when your puppy can safely meet the wider world.
Puppy Vaccination Schedule Explained by Age
6 to 8 weeks: the first visit
Bring any paperwork from the breeder or shelter, however partial it is. The vet will examine your puppy, check for parasites, start the DHPP series and talk through what is coming in the next two months. Owners who took their puppy at six weeks report that this first appointment felt like a formality; two more visits followed.
If your puppy is younger than six weeks or was ill at the first visit, the vet may wait. Vaccination works best in a healthy animal, and a puppy vaccinated while unwell may not respond properly.
10 to 12 weeks: second dose and the rabies decision
This is where lifestyle questions come up. Boarding, daycare, dog parks, standing water, ticks and show circuits all belong in the conversation now, because vaccines given here need weeks to become protective. Rabies is typically given at this visit, subject to the minimum age your local law sets.
14 to 16 weeks: the dose that finishes the series
The final DHPP dose is the one most worth keeping. It is the dose given after maternal antibodies have faded, and skipping it to save a visit is the most common way a puppy ends up unprotected while looking vaccinated on paper. Boarders and pet sitters check records carefully for exactly this gap.
Puppy classes and well-socialized, vaccinated adult dogs are reasonable places to go at this stage, ideally carried or on a floor rather than set down in a high-traffic spot.
One year and beyond: boosters
About a year after the puppy series, DHPP and rabies boosters are given. After that, most adult dogs receive DHPP every three years. Rabies boosters follow local law and the product used, which is often a one-year or three-year formulation. Non-core vaccines tend to repeat yearly, and Bordetella every six months for dogs that board regularly.
| Vaccine | Typical booster interval |
|---|---|
| DHPP | 1 year after the puppy series, then every 3 years |
| Rabies | Every 1 to 3 years, following local law and product type |
| Bordetella | Every 6 months when boarding or grooming is regular |
| Leptospirosis, Lyme, canine influenza | Every year while risk continues |
What If a Puppy Is Late or Misses a Vaccine?
Call the clinic as soon as you realize, and let them rebuild the schedule. Some vaccines need only the remaining doses at shorter intervals; others may need a restart. The right call depends on the vaccine, your puppy’s age, and how long the gap was.
Do not try to build a replacement schedule yourself by counting what your puppy already received. Owners with sixteen-week-old rescues vaccinated only against parvo have needed an accelerated full series, and the arithmetic differs case by case.
If records are missing or entirely unknown, say so plainly at the first visit. Many vets treat an unknown history as an unvaccinated puppy and start from the beginning, which is frustrating but not dangerous. Ask what the clinic needs in writing before the next visit, and ask for the dates and vaccine names on the certificate, not just a vague note.
One common source of confusion: breeders, shelters and clinics give different starting ages, and you may see six weeks, six to ten weeks and eight weeks all recommended. The guidance is not as contradictory as it looks. Earlier start means more visits, and your vet weighs your puppy’s age against its health when setting the dates.
What Side Effects Are Normal, and When Should You Call?
Many puppies have a quiet day or two after a shot. Owners describe a puppy who sleeps through the next day, turns away from food for a meal or two, and seems tender around the injection site. Soreness, mild tiredness and a reduced appetite for 24 to 48 hours are common. Call your vet if it lasts longer than that, but a sleepy puppy is not, on its own, an emergency.
Some signs need attention right away rather than a morning phone call. Face or throat swelling, repeated vomiting, difficulty breathing, collapse, or extreme weakness are emergencies. So is a puppy who seems fine for two hours and then starts to swell or struggle, which is how some severe allergic reactions appear.
Two practical notes. Watch your puppy closely for a few hours after the shot rather than leaving them alone with other dogs, and mention any previous reaction at the next appointment, because it changes what gets given and how.
How to Prepare for Your Puppy’s Vaccination Appointments
A short list makes each visit faster and the record cleaner.
- Bring the paperwork you have. Shelter or breeder records, even incomplete ones, tell the vet what is already on record.
- Note the puppy’s exact age. Age to the day changes both the dosing schedule and what counts legally for rabies.
- Disclose illness and medication. Diarrhea, coughing, a course of antibiotics and past vaccine reactions all belong in the conversation.
- Ask what to avoid. Good clinics will tell you which surfaces and situations are sensible to skip until your puppy is further along.
- Ask for a printed certificate listing vaccine names, dates, product and expiry, plus when the next dose is due. Groomers, boarding kennels, daycares and airlines each ask for proof in their own format.
- Book the next visit before you leave. The appointments sit two to four weeks apart, and a slipped date is the most common reason a puppy ends up under-vaccinated.
Carry your puppy rather than letting them stand on communal grass or pet store floors. Pavement, a friend’s vaccinated dog, a well-run class and a carried puppy all reduce risk without making your puppy’s first months lonely or fearful.
Frequently Asked Questions
How many weeks does a puppy have to be to get shots?
Most puppies start between six and eight weeks old, and the series runs every two to four weeks until about sixteen weeks. Starting earlier is sometimes possible when a puppy came from an exposed litter. Your veterinarian sets the actual dates based on your puppy’s age and health at the visit.
What is the 7 7 7 rule for puppies?
It is a socialization guideline, not a medical rule: meet seven people, seven dogs and seven places by seven weeks of age, once your vet says the puppy is well enough. The window closes around sixteen weeks, which is exactly when many puppies are still finishing their vaccine series.
What is the 3/2/1 rule for vaccines?
It is a shorthand for the core schedule: three doses of DHPP for puppies, the first given before one year of age, and a booster every three years after that. Rabies follows local law instead, often one year then three, so treat 3/2/1 as a starting point rather than the whole picture.
What are the signs of a vaccine reaction?
Common signs include soreness at the injection site, tiredness and a smaller appetite for a day or two. Emergency signs are face or throat swelling, repeated vomiting, breathing difficulty, collapse or extreme weakness. Severe allergic reactions can appear within minutes to hours, so stay with your puppy for a few hours after the shot.
What happens if you wait too long between puppy vaccinations?
A long gap can leave your puppy unprotected, because the series only works when doses arrive at the right intervals. It may also mean restarting or adding doses. Call your clinic as soon as you notice the delay and let them rebuild the schedule; do not shift future dates yourself without checking first.
What not to do before puppy vaccinations?
Avoid dog parks, communal grass, pet store floors and unknown dogs, especially before the series finishes and for about two weeks after the last dose. Carrying your puppy, using a paved route and attending a class with vaccinated dogs give social contact without the highest exposure. Also avoid puppy pet shops that sell unweaned animals.
What to Do First
Book the first visit within a week of bringing your puppy home, and bring whatever records exist even if they are a scrap of paper. Keep the dates for the following two visits in the calendar, because the dose at sixteen weeks is the one that decides whether your puppy is genuinely protected. Everything after that, from non-core vaccines to socialization, follows from that plan and from what your vet tells you.