Puppy Vaccination Schedule, Explained
The shots, the ages they fall due, and why the booster matters — in plain language.
Vaccination schedules for puppies can read like alphabet soup — DHPP, rabies, lepto — so here is what is actually happening, and why the dates matter.
Why puppies get a series, not one shot
A puppy is born with antibodies from its mother that protect it early but also block a vaccine from working. As those fade, the puppy becomes vulnerable in a window. The series of shots closes that window by vaccinating at the ages when the vaccine can finally work — usually starting around 6 to 8 weeks and repeating every few weeks until about 16 weeks.
The core vaccine (DHPP)
The combination vaccine covers distemper, hepatitis, parvo and parainfluenza. It is the core set every vet gives, and it is given as a series — typically at 8 weeks, 12 weeks and 16 weeks, with a booster a year later. Parvo is the one owners fear, and the series is why.
The boosters
The booster a year later matters as much as the series itself — it is what keeps immunity strong into adulthood. Skipping it leaves a gap at exactly the age the puppy becomes a dog.
Why the tracker helps
The pack includes a vaccination tracker for a reason: the schedule has several dates spread across months, and remembering them is exactly what a printout fixes. Mark each dose when it is given and you will never guess whether a booster is due.