Puppy Vaccination Schedule by Age: What Happens When (and Why)

Most puppies start vaccines around 6 to 8 weeks old, get a booster every 2 to 4 weeks until they're about 16 weeks, and then settle into a once-a-year or once-every-three-years rhythm. That's the whole shape of it. The details below help you understand what your vet is scheduling and why each visit matters.

One thing before the table: this is a general timeline, not a prescription. Breeders, regions, and individual puppies differ, and your vet will set the exact dates. Your job is simpler: show up to every booster, on time. That's where most plans quietly fall apart.

The typical timeline

6 to 8 weeks

• First DHPP (distemper, hepatitis, parvovirus, parainfluenza)

• Often the first deworming round too (see our puppy deworming guide)

10 to 12 weeks

• Second DHPP

• Optional non-core vaccines start here depending on lifestyle: Bordetella for daycare and boarding, Leptospirosis where it's common

14 to 16 weeks

• Third DHPP

• Rabies (timing varies by local law, many regions require it by 16 weeks)

12 to 16 months

• DHPP booster

• Rabies booster

Adult years

• DHPP every 1 to 3 years depending on the vaccine your clinic uses

• Rabies on the schedule your local law requires

Why so many boosters?

Puppies are born with antibodies from their mother's milk. Those antibodies fade somewhere between 6 and 16 weeks, and nobody knows the exact week for any individual puppy. While maternal antibodies are still around, they can neutralize a vaccine before the puppy's own immune system learns from it.

So vets vaccinate in a series. Each round is a new attempt to catch the window after mom's protection fades and before the real world gets a shot at your puppy. Skipping a booster doesn't mean "slightly less protected." It can mean a gap in protection during the most vulnerable weeks of your dog's life. Parvo in particular is brutal, expensive to treat, and very preventable.

The part nobody warns you about: remembering

The schedule isn't hard to understand. It's hard to execute. The boosters land every 2 to 4 weeks for two months, then the rhythm changes, then it changes again at the one-year mark. Add a second pet and a partner who also books appointments, and "wait, did she get her third shot?" becomes a real conversation.

A fridge calendar works until someone forgets to write on it. What works better is a system that already knows the rhythm:

• In MoaTails, log each vaccine in the vaccination tracker as it happens

• Set the next booster as a reminder the moment you leave the clinic, while the date is fresh

• Everyone on your care team sees the same record, so the "did she get it?" question answers itself

• Store the vaccine certificate photo in document storage. Boarding kennels and groomers ask for it, always at the worst moment.

Core vs non-core, in one minute

Core vaccines (DHPP, rabies) are for every dog, everywhere. Non-core vaccines depend on how your dog actually lives:

• Bordetella: daycare, boarding, dog parks, grooming salons

• Leptospirosis: standing water, wildlife, rural areas, and increasingly cities too

• Lyme: tick-heavy regions and hiking dogs

• Canine influenza: boarding and show environments, regional outbreaks

Ask your vet which of these match your puppy's life. "All of them, just in case" isn't the answer; targeted protection is.

Frequently asked questions

Can my puppy go outside before the shots are done? Carried in your arms, yes, and early socialization matters a lot. On the ground in public spaces where unvaccinated dogs may have been, not until about a week after the final puppy booster. Your own garden is usually fine if no unknown dogs visit it.

What if we missed a booster by a week or two? Call your vet. Usually the series just continues, occasionally a round gets repeated. What matters is telling the clinic the real dates, which is much easier when they're logged instead of remembered. We wrote more in what happens if you miss a vaccination.

Do small breeds and large breeds follow different schedules? The core series is the same shape. Some vets adjust non-core timing or split visits for tiny breeds. That's a clinic decision, not something to improvise at home.

Are titer tests an alternative to boosters? For some adult core vaccines, some vets offer titer testing to check immunity before re-vaccinating. It's a conversation for the one-year visit, not for the puppy series.

Keep Reading

• Puppy Deworming: The Schedule Behind the Schedule

• Kitten Vaccination Schedule: Why 8 Weeks Is the Magic Start

• Vaccinations & Deworming in MoaTails (docs)