What Shots Do Puppies Need?

Every puppy needs the core vaccines: distemper, parvovirus, adenovirus (usually combined in one DHPP shot) given as a series at roughly 6-8, 10-12, and 14-16 weeks, plus rabies as required by law. Lifestyle vaccines like bordetella, leptospirosis, and Lyme depend on where and how your puppy will live; your vet sets the exact schedule.

The Core Series, and Why It Repeats

Puppies are born with temporary immunity borrowed from their mother’s milk, and it fades on an unpredictable schedule somewhere between six and sixteen weeks. While it lasts, it can neutralize vaccines; once it fades, the puppy is exposed. The vaccine series exists to bridge that uncertainty: shots every three to four weeks ensure at least one lands after mom’s immunity fades and before the world’s viruses find the gap. That is why finishing the whole series matters even when the puppy seems fine, and why the final shot around sixteen weeks is the one that seals protection. Parvovirus is the reason vets are strict here: it is everywhere, it survives in soil for years, and it kills unvaccinated puppies routinely. A booster follows at one year, then typically every one to three years for life.

Rabies and the Lifestyle Shots

Rabies is the legal one: a single shot between twelve and sixteen weeks in most places, required by law because the disease is fatal and transmissible to humans. The rest are decided by your puppy’s actual life. Bordetella (kennel cough) makes sense for any dog headed to daycare, boarding, grooming, or dog parks. Leptospirosis, spread by wildlife urine in water and soil, has moved from optional to recommended in many regions; ask what your area sees. Lyme matters in tick country. Canine influenza matters for social dogs in outbreak regions. None of these are upsells when they match your dog’s exposure; all of them are when they do not, which is why the honest answer to “which ones?” is a five-minute conversation with a vet who knows your county.

The Awkward Middle Weeks

Between the first shot and the last, puppies live in a contradiction: not yet fully protected, but at the peak socialization window that shapes their whole adult temperament. Total lockdown until sixteen weeks creates fearful adult dogs, which carries its own lifelong risks. The workable middle: carry the puppy in public, visit vaccinated adult dogs in private homes, attend puppy classes that require proof of first shots, and avoid dog parks, pet-store floors, and unknown-dog areas until the series is done. Our socialization guide maps those weeks in detail. Expect mild soreness or sleepiness for a day after shots; facial swelling, vomiting, or collapse is rare and is an immediate vet call. And keep the vaccine record somewhere findable; groomers, boarders, and trainers will ask for it for the rest of your dog’s life.