When does a puppy get vaccinated?

Core vaccines start at 6-8 weeks (DHPP first dose), continue at 10-12 weeks (DHPP second dose), and complete at 14-16 weeks (DHPP third dose plus Rabies). A booster is given at 12-16 months, then every 1-3 years for adult dogs depending on the vaccine and local regulations.

Can I take my puppy outside before vaccinations are complete?

Low-risk socialization is both safe and necessary before full vaccination. The AVSAB position statement explicitly states that socialization should not wait for the full vaccine series because the socialization window closes before vaccines are complete. Avoid dog parks, pet store floors, and contact with unknown dogs. Carry your puppy in busy areas.

What is the DHPP vaccine?

DHPP is a combination vaccine covering four diseases: Distemper (severe neurological and respiratory disease), Hepatitis (adenovirus affecting the liver), Parvovirus (highly contagious and often fatal intestinal disease), and Parainfluenza (component of kennel cough). All four are core vaccines recommended for every puppy.

Is Rabies vaccination required by law?

In most countries and US states, yes. Rabies vaccination is legally required and is the only vaccine with a specific legal mandate in most jurisdictions. Your vet will provide a Rabies certificate after vaccination, which is needed for licensing, travel, and boarding.

What side effects should I expect after vaccination?

Mild lethargy and soreness at the injection site for 24-48 hours is completely normal. A small lump at the injection site may persist for several weeks. Contact your vet immediately if you see facial swelling, hives, repeated vomiting, or difficulty breathing — these are signs of an allergic reaction.

What is the difference between core and non-core vaccines?

Core vaccines are recommended for every puppy regardless of lifestyle: DHPP and Rabies. Non-core vaccines are recommended based on risk factors: Bordetella (kennel cough) for dogs in daycares or grooming; Leptospirosis for dogs with wildlife or water exposure; Lyme for tick-endemic areas; Canine Influenza for social dogs.

My puppy had all their shots. Are they now fully protected?

Protection builds gradually over the series. After the third DHPP dose at 14-16 weeks, immunity is considered solid. Maternal antibodies from the mother can interfere with early doses, which is why the series is necessary rather than a single shot. Annual or triennial boosters maintain the protection.

Puppy Vaccination Schedule — Complete Guide

Which vaccines does your puppy need and when? A detailed guide with a full timeline, vaccine types, and explanations for each disease.

Why Vaccines Matter More Than You Think

Parvovirus kills the majority of unvaccinated puppies who contract it. Distemper can cause permanent neurological damage. These are not rare edge cases — they are active in soil and environments worldwide.

Vaccines work by training the immune system to recognize and rapidly respond to pathogens before they cause disease. A single dose is rarely enough — the series is required because maternal antibodies from the mother can block the immune response to early doses. The third dose at 14-16 weeks is the one that typically produces full immunity.

The Core Vaccine Schedule

Age	Vaccine	Notes
6-8 weeks	DHPP (dose 1)	First dose; maternal antibodies may still be present
10-12 weeks	DHPP (dose 2)	Required even if dose 1 was given late
14-16 weeks	DHPP (dose 3) + Rabies	Completes core series; Rabies is legally required
12-16 months	DHPP booster + Rabies booster	First adult booster
Every 1-3 years	Core boosters	Frequency depends on vaccine type and local regulations

What the DHPP Vaccine Covers

The DHPP combination vaccine protects against four diseases:

D — Distemper: A severe viral disease affecting the respiratory system, gastrointestinal tract, and nervous system. Can cause seizures and permanent neurological damage in survivors.

H — Hepatitis (Adenovirus): Causes liver inflammation and acute kidney damage. Also contributes to kennel cough.

P — Parvovirus: Highly contagious and often fatal intestinal disease. Destroys cells in the intestinal lining and immune system. Particularly deadly in puppies under 4 months.

P — Parainfluenza: A component of the kennel cough complex. Highly contagious respiratory infection.

Non-Core Vaccines: When They Are Recommended

Vaccine	Recommended for
Bordetella (Kennel Cough)	Dogs in daycares, boarding, grooming, dog parks
Leptospirosis	Dogs with wildlife exposure, swimming in natural water
Lyme	Dogs in tick-endemic areas
Canine Influenza	Highly social dogs in outbreak areas

Your vet will recommend non-core vaccines based on your specific dog and environment. A city apartment dog rarely needs Leptospirosis. A rural hunting dog almost certainly does.

Socialization vs. Vaccination: The Most Common Question

Many new owners ask: do I wait until vaccines are complete before socializing my puppy?

The answer from the AVSAB (American Veterinary Society of Animal Behavior): No. Waiting for full vaccination before socialization means missing the primary socialization window (which closes at 12-14 weeks) entirely. The behavioral risks of under-socialization are as serious as the disease risks.

What is safe before full vaccination:

Carrying your puppy in busy public areas
Inviting vaccinated, healthy dogs to your home
Puppy classes where vaccination records are required and surfaces are cleaned
Exposure to people, sounds, surfaces, and environments in low-risk settings

What to avoid: Dog parks, pet store floors, contact with dogs of unknown vaccination status.

What to Expect at Each Vet Visit

6-8 weeks: Physical exam head to tail (eyes, ears, heart, abdomen), first DHPP, discussion of parasite prevention.

10-12 weeks: Second DHPP, possible Bordetella if starting socialization classes, fecal test for parasites.

14-16 weeks: Third DHPP, Rabies vaccination, discussion of spay/neuter timing, microchipping if not done.

Cost range: $50-150 per visit depending on location and what is included. Many practices offer puppy packages that bundle the first year of visits.

Normal Side Effects vs. When to Call the Vet

Normal: Mild lethargy for 24-48 hours after vaccination. Soreness and a small lump at the injection site. Reduced appetite for a day.

Call the vet: Facial swelling or hives within 30 minutes of the vaccine. Repeated vomiting. Difficulty breathing. Collapse. These indicate an allergic reaction and need immediate treatment.

After the Full Series: What Changes

Once the full DHPP series is complete at 14-16 weeks, your puppy is protected against the four core diseases. You can now:

Let them walk in most public spaces
Introduce them to unknown dogs with more confidence
Attend regular dog parks (with appropriate supervision)

The Rabies certificate from the vet is also now available — needed for licensing, boarding, and travel in most jurisdictions.

Keep a Puppy Health Record (Free Checklist + Puppy AI Tracker)

A puppy health record is the single document a vet, kennel, groomer, or new owner will ask for. At minimum it should include:

Vaccination dates and brand for each dose (DHPP, rabies, optional Bordetella/Lepto/Lyme)
Deworming and parasite prevention dates (fleas, ticks, heartworm)
Weight at each visit
Microchip number
Spay/neuter date
Any allergies or adverse reactions
Vet contact info

Two ways to keep it:

Printable PDF — good for the fridge, bad for reminders. Easy to lose.
Puppy AI tracker — every dose, weight, and vet visit logged with date stamps, plus reminders before the next vaccine is due. Exportable to PDF when your boarder asks.

Most owners start with paper and switch the moment they miss a booster. Skip the missed booster — start a free Puppy AI record and import what you already have.

How Puppy AI Helps

Store all vaccination records in Puppy AI and the app sends reminders before each upcoming dose. No more lost papers or guessing when the next appointment is due.