Complete Puppy Vaccination Schedule (With Timeline)

Why puppy shots are so confusing

Your puppy needs multiple rounds of vaccines, spaced a few weeks apart, with names that sound like alphabet soup. DHPP, DAPP, DA2PP — depending on the vet, they might call the same shot different things. Then there are the optional ones that might not be optional depending on where you live.

It's a lot. And the stakes feel high, because they are. Parvovirus alone kills roughly 90% of untreated puppies, and it's entirely preventable with the right vaccines at the right time.

Here's the full timeline, broken down so you know exactly what your puppy needs and when.

Core vs non-core: what's the difference?

Not every puppy needs every vaccine. The AAHA canine vaccination guidelines split them into two groups:

Core vaccines are recommended for every dog regardless of lifestyle:

• DHPP — distemper, hepatitis (adenovirus), parainfluenza, parvovirus. This is the big combination shot your puppy gets in multiple rounds.
• Rabies — legally required in every US state. Usually given once at 14 to 16 weeks.

Non-core vaccines depend on where you live and what your dog does:

• Bordetella — kennel cough. Needed if your puppy will be boarded, groomed, or in group training.
• Leptospirosis — a bacterial infection spread through standing water and wildlife urine. Common in humid climates and rural areas.
• Lyme — recommended if you're in a high-risk tick area, especially the Northeast and upper Midwest.
• Canine influenza (H3N2/H3N8) — often required by boarding facilities and daycares.

Your vet will recommend non-core vaccines based on your area and your puppy's exposure risk. If you're unsure, just ask.

6 to 8 weeks: first round

Most puppies get their first shots before they come home, but verify this with your breeder or shelter. If they haven't started, your vet will begin at the first visit.

At this age:

• DHPP #1 (core)
• Fecal test for parasites
• Some vets start Bordetella here if the puppy will be in group settings early

Maternal antibodies from nursing are still providing some protection at this age, which is actually why puppies need multiple rounds. Those antibodies can interfere with the vaccine's effectiveness, so a single shot isn't enough.

10 to 12 weeks: second round

This visit builds on the first round and introduces any non-core vaccines your vet recommends.

• DHPP #2 (core)
• Bordetella if not started at 6 to 8 weeks
• Leptospirosis #1 (if recommended for your area)
• Canine influenza #1 (if your puppy will be in daycare or boarding)

This is also the window where socialization matters most. You don't need to wait until vaccines are "complete" to start exposing your puppy to new experiences. The AVSAB recommends beginning socialization as early as 7 to 8 weeks, using controlled environments and avoiding high-risk areas like dog parks until the series is finished.

14 to 16 weeks: the critical round

This is the one that counts most. The final DHPP booster ensures your puppy builds lasting immunity now that maternal antibodies have fully faded.

• DHPP #3 (core)
• Rabies (core) — one dose, legally required
• Leptospirosis #2 (if started earlier)
• Lyme #1 (if in a tick-prone area)
• Canine influenza #2 (if started earlier)

After the rabies vaccine, your vet will give you a certificate. Keep it. You'll need it for licensing, boarding, grooming, and travel.

Two weeks after this visit, your puppy is considered fully vaccinated against the core diseases. That's when it's safe to visit dog parks, pet stores, and other places where unvaccinated dogs might have been.

12 to 16 months: booster year

About a year after the puppy series, everything comes back around.

• DHPP booster (core) — this one-year booster is what transitions your dog to an every-three-years schedule for DHPP going forward
• Rabies booster — timing depends on state law and whether the first dose was a 1-year or 3-year vaccine
• Bordetella booster (annual or every 6 months depending on the product)
• Leptospirosis booster (annual)
• Lyme booster (annual, if applicable)
• Canine influenza booster (annual, if applicable)

After this round, your dog moves to an adult vaccination schedule. Most core vaccines shift to every 3 years, while non-core vaccines stay annual.

The full schedule at a glance

Your vet may adjust timing slightly based on your puppy's health, breed, or risk factors. This schedule reflects the 2022 AAHA guidelines and is a reliable starting point for most puppies in the US.

What if you missed a vaccine?

Life happens. Maybe you adopted a rescue with no records, or you got behind on a booster. The good news: for most vaccines, your vet can pick up where you left off without restarting the entire series.

The exception is if your puppy missed the initial series entirely and is now older than 16 weeks. In that case, the protocol changes slightly — usually two doses spaced 3 to 4 weeks apart instead of three — but protection is still very achievable.

Either way, call your vet rather than guessing. They deal with catch-up schedules all the time.

Keeping track without the spreadsheet

Between DHPP rounds, Bordetella boosters, and rabies certificates, there are a lot of dates to track. And the intervals aren't consistent — some are 3 to 4 weeks apart, some are annual, some are every 3 years.

Pet Care Reminder makes this simple. Add your puppy's vaccination dates as you go, set reminders for upcoming boosters, and keep your records in one place. When your vet asks if your dog is up to date on leptospirosis, you'll actually know the answer.

Sources

1. AAHA Canine Vaccination Guidelines (2022) — American Animal Hospital Association recommendations for core and non-core vaccines, timing, and booster intervals
2. AKC Puppy Vaccination Schedule — American Kennel Club overview of which shots puppies need and when
3. AVMA Canine Parvovirus — American Veterinary Medical Association information on parvovirus risks and prevention
4. AVSAB Position Statement on Puppy Socialization — Guidance on beginning socialization before the vaccine series is complete
5. CDC Lyme Disease Statistics — Geographic distribution and risk data for Lyme disease in the US