Puppy Vaccination Schedule: Which Shots, and When

The puppy shots schedule at a glance

A typical first-year plan looks like this. At 6 to 8 weeks, the first combination shot covering distemper, adenovirus (hepatitis), parvovirus and usually parainfluenza, often written DHPP or DAPPV. At roughly 10 to 12 weeks, the second combination shot, and often the first leptospirosis dose where your vet recommends it. At 12 to 16 weeks, rabies and the next combination booster. At 16 weeks or a little later, the final combination shot of the puppy series.

Some clinics run the series at 8, 12 and 16 weeks; others start at 6 weeks and give four doses. Both approaches aim at the same goal: a dose that lands after the mother's antibodies have faded. Ask for a printed schedule at the first visit and put the next date in your calendar before you leave, because a gap of more than a few weeks can mean restarting part of the series.

Why puppies need a series instead of one shot

Puppies are born with short-term protection from their mother's antibodies, picked up mostly through early milk. Those antibodies also neutralize a vaccine, so a shot given while they are still high may simply not take. Nobody can tell in advance when an individual puppy's maternal protection will drop, which is why vets give a series spaced a few weeks apart: one of those doses will arrive in the window when it can do its job.

This is also why the last puppy dose should be given at or after 16 weeks. Stopping the series early, even when the puppy seems healthy, can leave a gap in protection against parvovirus and distemper, two diseases that are often fatal in young dogs and that spread through contaminated ground, shoes and other dogs' feces.

Core vaccines every puppy gets

Core vaccines protect against diseases that are widespread, serious or a risk to people. For dogs in the U.S. that means distemper, adenovirus (canine hepatitis), parvovirus and rabies, with parainfluenza commonly included in the combination shot. VCA Animal Hospitals also lists leptospirosis among the core vaccines it follows, while some clinics treat it as risk-based, so the answer you get may depend on where you live.

Rabies is the one shot that is also a legal matter. Most states require it, the first dose is usually given at 12 weeks or older, and the booster timing (one year, then every one or three years) follows local law. Keep the rabies certificate with your puppy's records, because boarding kennels, groomers and some rental properties ask to see it.

Lifestyle vaccines your vet may suggest

Several vaccines depend on how and where your puppy will live. Bordetella (part of the kennel cough complex) is often required for boarding, daycare and group training classes, and is commonly given as an intranasal dose. Canine influenza is aimed at dogs in high-contact settings or areas with outbreaks, and needs two doses a few weeks apart. Lyme disease vaccination is recommended in areas where infected ticks are common.

Tell your vet about planned daycare, hiking, travel or a cabin in tick country. That conversation, not a generic chart, should decide which of these your puppy receives. If a vaccine is optional for your situation, it is reasonable to ask what the risk is locally and what skipping it would mean.

Boosters after the puppy series

The puppy series is not the end. About a year after the final puppy dose, often somewhere around 16 to 20 months of age, your dog will need boosters. VCA's schedule gives the combination vaccine every three years after that first adult booster, while leptospirosis, Bordetella and Lyme are generally yearly where they are used.

Your vet may combine these with an annual wellness exam, a heartworm test and a stool check. If you adopted an adult dog with no records, expect a fresh starter series rather than a guess, since there is no reliable way to know what was given before.

Until your vet says your puppy is protected, keep it away from places other dogs frequent; a puppy playpen and puppy pads make home life easier during that time.

Keeping your puppy safe until the series is done

Until the full series is complete, keep your puppy away from places where unknown dogs gather: dog parks, pet store floors, rest stops and busy sidewalks. Potty breaks in your own yard and visits with healthy, vaccinated dogs you know are generally fine. The AKC suggests waiting until 7 to 10 days after the final puppy shots before trying a dog park.

Socialization still matters during this window, so carry your puppy to new places, invite calm visitors over, and ask your vet about puppy classes that require proof of vaccination. Mild soreness or sleepiness for a day after a shot is common. Facial swelling, hives, repeated vomiting or trouble breathing after a vaccine needs a call to your vet straight away.

This page is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your pet.