Your puppy’s first vet visits can feel like acronym soup. DA2PP. Lepto. Bordetella. Rabies. Then someone starts talking about flea, tick, heartworm, and intestinal parasite prevention as if those are all the same thing.
They are not.
This guide gives you a working map. Your veterinarian still needs to set the exact schedule because vaccine products, local disease risk, your puppy’s health, and rabies law can change the plan.
The short version
For most puppies in the United States, the starting plan looks like this:
| Age | What is commonly due | What changes the plan |
|---|---|---|
| 6 to 8 weeks | First distemper, adenovirus, and parvovirus combination dose | The puppy’s records, health, and age at the first dose |
| Every 2 to 4 weeks through at least 16 weeks | Repeat the core combination series | Local disease risk may lead a veterinarian to continue through 18 to 20 weeks |
| Starting at 12 weeks | First leptospirosis dose, followed by a second dose 2 to 4 weeks later | A medical contraindication or the veterinarian’s product-specific plan |
| Set by state or local law | Rabies | Legal minimum age, approved vaccine label, and local booster rules |
| Based on exposure | Bordetella, canine influenza, and Lyme disease | Daycare, boarding, travel, geography, tick exposure, and outbreak risk |
That table is a planning tool, not a prescription. Bring every vaccine record you have to the appointment, including breeder, shelter, or rescue paperwork.
Core vaccines
Distemper, adenovirus, and parvovirus
These vaccines are usually combined in a shot labeled DA2PP, DAPP, or a similar acronym. Parainfluenza is included in many combination products, but the exact label can differ.
The American Animal Hospital Association’s current schedule recommends at least three combination doses between 6 and 16 weeks of age, spaced 2 to 4 weeks apart. The important part is not hitting one magic date. It is making sure the final puppy-series dose is given at 16 weeks of age or older, when interference from maternal antibodies is less likely.
In higher-risk settings, a veterinarian may continue the series through 18 to 20 weeks. The 2024 WSAVA vaccination guidelines also recommend a core-vaccine dose at 26 weeks of age or older as one way to close the immunity gap that can remain after the early puppy series. Your clinic may instead time that follow-up within the first year under the AAHA schedule.
After the initial series and first follow-up dose, AAHA recommends combination-vaccine boosters at three-year intervals. Product labels and an individual dog’s medical needs still matter.
Leptospirosis
Leptospirosis is no longer best described as an optional country-dog vaccine. Dogs can encounter infected animal urine in urban, suburban, and rural environments.
AAHA updated its guidelines in 2024 to classify a four-serovar leptospirosis vaccine as core for dogs unless there is a specific medical reason not to vaccinate. The initial series is two doses, 2 to 4 weeks apart, starting at 12 weeks of age. AAHA then recommends a dose within one year of the initial series and annual boosters after that. The AAHA leptospirosis guidance explains the exposure risks and why the four-serovar vaccine is preferred.
WSAVA uses a slightly narrower global definition: leptospirosis is core where the disease is endemic, relevant serogroups are known, and suitable vaccines are available. For a U.S. puppy, use your veterinarian’s local risk assessment and the current AAHA recommendation.
Rabies
Rabies is fatal after clinical signs appear and is regulated differently from the other vaccines on this page.
There is no single nationwide puppy date or booster interval that overrides state and local law. The minimum age, approved product, certificate requirements, and one-year or three-year booster rules depend on where you live. AAHA’s schedule therefore lists rabies simply as “as required by law.”
Ask your clinic which rule applies to your address and keep the signed rabies certificate. Travel, licensing, boarding, and exposure management may depend on it.
Vaccines based on exposure
“Noncore” does not mean unimportant. It means the decision depends on the dog and the exposure.
Bordetella and respiratory-disease vaccines
Bordetella vaccination may be appropriate for puppies who attend classes, daycare, boarding, grooming, shows, or other places where dogs share air and space. Oral, intranasal, and injectable products do not all use the same initial schedule. Do not copy another dog’s timing. Follow the product and your veterinarian’s instructions.
Canine influenza vaccination is also exposure-based. AAHA lists an initial two-dose series, 2 to 4 weeks apart, for dogs whose local or lifestyle risk supports it, followed by annual vaccination if that risk continues.
Lyme disease
Lyme vaccination is a risk-based decision tied to geography, tick exposure, travel, and the individual dog’s health. AAHA lists an initial two-dose series, 2 to 4 weeks apart, followed by annual vaccination when continued protection is appropriate. Vaccination does not replace tick prevention.
A vaccine that should not be on the routine list
Canine enteric coronavirus is not the same virus as COVID-19. More importantly, the 2024 WSAVA guidelines do not recommend vaccination against canine enteric coronavirus. WSAVA found weak evidence that it is a primary cause of intestinal disease in adult dogs and no evidence that available vaccines protect against emerging pantropic strains.
If “coronavirus” appears on a proposed vaccine list, ask the clinic which virus and product it means before agreeing to it.
What if a dose was missed or the records are unclear?
Call the veterinary clinic with the dates and product names you have. Do not assume the whole series must restart, but do not assume a late dose simply picks up where you left off either.
AAHA tells veterinarians to use the specific manufacturer’s instructions for overdue vaccines. The answer can change by vaccine type, age, number of valid prior doses, and time since the last dose. Rabies also has separate legal rules. If the history is unknown, AAHA notes that the benefit of vaccinating generally outweighs the risk, but that is still a clinical decision for the veterinarian treating your puppy.
Parasite prevention is a separate plan
Vaccines do not prevent heartworm, fleas, ticks, or intestinal worms.
The Companion Animal Parasite Council recommends year-round broad-spectrum parasite control and early deworming for puppies. That does not mean every puppy should receive the same product at the same age.
- Heartworm preventives come as oral, topical, and injectable products with different labels and minimum ages. The American Heartworm Society says puppies younger than 7 months can generally start prevention without a pre-start heartworm test, but follow-up testing is still needed.
- Flea and tick products have product-specific species, age, weight, health, and dosing restrictions.
- Heartworm products vary in which intestinal parasites they also cover. A monthly preventive does not automatically cover every roundworm, hookworm, whipworm, or tapeworm risk.
- A growing puppy may move into a new weight band. Confirm the dose before giving the next package.
The FDA’s flea and tick safety guidance says to use a product labeled for the animal’s species, life stage, and minimum weight, and to read the current label even if you have used the product before. Ask your veterinarian to match the product to your puppy’s health, medications, location, and exposure.
Socialization before the series is complete
Full isolation until the final vaccine can cost a puppy important learning time. Uncontrolled exposure is not the answer either.
AAHA’s behavior guidance says puppy classes and social exposure do not need to wait until the entire series is complete when sick animals are excluded and appropriate hygiene is used. Your veterinarian should still advise you about local parvovirus and outbreak risk.
Safer early options may include:
- A well-run puppy class that checks vaccine and health status and cleans its surfaces
- Calm visits with healthy dogs whose vaccination status is known
- Being carried or using a stroller in higher-risk public areas
- Positive exposure to people, sounds, surfaces, handling, cars, and household routines
Avoid dog parks and heavily trafficked dog areas where health and vaccination status are unknown until your veterinarian clears them.
Vaccine reactions: what to watch for
Mild sleepiness, soreness or swelling at the injection site, a low fever, or a short-lived drop in appetite can happen after vaccination. Contact the clinic if those signs cause significant discomfort or last more than a day or two.
Serious allergic reactions are uncommon, but they can become life-threatening. The American Veterinary Medical Association’s vaccination handout says to seek veterinary care immediately for:
- Persistent vomiting or diarrhea
- Hives or itchy, bumpy skin
- Swelling around the muzzle, face, neck, or eyes
- Severe coughing or difficulty breathing
- Collapse
Tell the clinic before vaccination if your puppy has reacted to a vaccine or medication in the past. If you are unsure whether a reaction is urgent, call the clinic or an emergency veterinary hospital instead of waiting for an article to decide.
What puppy vaccines cost
There is no honest national price that will tell you what your visits will cost. Fees vary by clinic, region, exam requirements, vaccine product, legal certificate fees, and which exposure-based vaccines your puppy needs.
Ask the clinic for a written estimate that separates:
- The examination fee
- Each vaccine and required booster
- Rabies certificate or licensing fees
- Fecal and heartworm testing
- Deworming and parasite prevention
- Any package discount and what the package leaves out
The cheapest package is not automatically the cheapest complete plan. Compare what is included, which future doses are required, and whether unused services expire.
Bring this checklist to the appointment
Low-pressure preparation can make the visit easier. Northern Veterinary Associates’ puppy-visit guide (opens in a new tab) suggests practicing with the harness and leash, taking short car rides, and gently handling the ears and feet before the appointment.
- Every vaccine and deworming record you received
- Your puppy’s current weight and any recent weight change
- A list or photo of every medication, supplement, and parasite product already given
- Any history of vomiting, diarrhea, coughing, fever, facial swelling, hives, or medication reactions
- Expected daycare, class, boarding, grooming, travel, hiking, wildlife, and tick exposure
- Questions about local rabies law and disease outbreaks
For general monitoring between visits, Under One Woof’s illness checklist (opens in a new tab) is a useful prompt for recording changes in appetite, thirst, energy, digestion, coughing, skin, or movement. It does not replace the urgent reaction guidance above.
You do not need to memorize the schedule. You need complete records, a clinic that explains its reasoning, and a plan you can follow.