Somewhere between "when's the next shot due" and "wait, did we already do that one," a lot of new puppy owners lose track of the vaccine schedule entirely — understandably, since it's more front-loaded and specific than almost anything else in a dog's life.
Here's the actual timeline, in plain terms, so you're never guessing what's next.
Why the first year looks so different from every year after
Puppies are born with some immunity from their mother, but it fades gradually and unpredictably over the first several weeks — which is why puppy vaccines are given as a series of boosters rather than a single shot. Each dose builds protection as the maternal immunity wanes, and skipping or delaying doses in the series can leave a real gap in protection during exactly the weeks a puppy is most vulnerable.
The general first-year timeline
| Age | Typical visit | What usually happens |
|---|---|---|
| 6–8 weeks | First puppy visit | Physical exam, first DHPP booster, fecal test, deworming |
| 10–12 weeks | Second visit | DHPP booster #2, possible Bordetella depending on lifestyle |
| 14–16 weeks | Third visit | DHPP booster #3, rabies vaccine (timing varies by state) |
| 4–6 months | Spay/neuter consultation | Discussion of timing based on breed and vet recommendation |
| 6 months | Follow-up as needed | Heartworm testing baseline (if not already done), weight check |
| 12 months | First "adult" annual visit | DHPP and rabies boosters, full exam, transition to adult schedule |
Why finishing the full series matters, not just starting it
A puppy who gets the first DHPP shot but misses the second or third booster isn't fully protected — the series works as a whole, not as individual doses with standalone value. This is one of the most common reasons a fully vaccinated-seeming puppy still ends up sick: the series was started but not completed on schedule.
Beyond vaccines: what else typically happens in year one
- Deworming — usually done at multiple early visits, since puppies commonly have intestinal parasites regardless of how clean their environment is
- Microchipping — often done alongside spay/neuter, though it can be done as a standalone procedure anytime
- Heartworm prevention — typically started around 8 weeks and continued monthly for life
- Flea and tick prevention — timing and product depend on your region and your vet's recommendation
None of this is complicated once it's laid out — the challenge is simply remembering which visit covered what, especially with three or four closely spaced appointments in the first few months. A missed booster because of a mixed-up date is an easy, avoidable gap.
Never lose track of what's due next
PetFolio Health keeps your puppy's vaccine schedule and every vet visit organized in your browser — so you always know what's done and what's coming up. No app to download.
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