The week we brought our puppy home, I taped a sheet of paper to the fridge with a column of dates on it. Vaccine due. Dewormer due. Next vet visit. Two weeks later half the boxes were unchecked and I genuinely could not remember whether the 8-week shot had happened or whether I'd just meant to book it. If you've ever stood in the kitchen squinting at a paper schedule like that, this guide is for you.
Puppies need a surprising amount of medical bookkeeping in their first few months, and the timing actually matters. Miss a parvo booster by a few weeks during the window when maternal antibodies are fading and you leave a real gap in protection. So here is the schedule most US owners are working against, what each item is for, and how to stop losing track of it.
Why the first 16 weeks are so busy
A newborn puppy gets temporary immunity from its mother's milk. That borrowed protection fades somewhere between 6 and 16 weeks, and nobody can predict the exact day it runs out for your specific dog. That uncertainty is the whole reason the vaccine schedule looks repetitive: vets give a series of shots a few weeks apart so that as the mother's antibodies drop, a vaccine is always there to take over.
Core vaccines and when they happen
Core vaccines are the ones recommended for essentially every dog regardless of where it lives or how it spends its days. According to the 2022 AAHA Canine Vaccination Guidelines, the core group covers distemper, adenovirus, parvovirus, and rabies, with leptospirosis now recommended broadly as well because dogs can pick it up in ordinary backyards and it can pass to people.
The combination distemper/parvo shot (often labeled DHPP or DAPP) usually starts around 6 to 8 weeks. It then repeats every 3 to 4 weeks until the puppy is at least 16 weeks old, which typically works out to three rounds. The rabies vaccine is given once between 12 and 16 weeks and is legally required for dogs in nearly every US state, so that one is not optional even if your dog never leaves the apartment.
A rough timeline looks like this:
- 6–8 weeks: first DHPP/DAPP
- 10–12 weeks: second DHPP/DAPP
- 12–16 weeks: rabies
- 14–16 weeks: final DHPP/DAPP
Your vet may shift these by a week or two based on your puppy's age when you got them and your local risk picture. The pattern, not the exact day, is what you're protecting.
Deworming runs on its own clock
Here's the part that trips people up: deworming is a separate schedule, and it starts even earlier than vaccines. Most puppies are actually born carrying roundworms, passed from the mother before birth or through nursing, which is why the first dose comes so early.
The common approach is deworming at 2, 4, 6, 8, 10, and 12 weeks, then moving to a less frequent interval. As Pawlicy Advisor lays out, after that intensive early phase puppies typically shift to monthly deworming for a while before settling into an adult routine. Some of these parasites, including roundworms and hookworms, can infect humans too, so this is one of those tasks that quietly protects the whole household, not just the dog.
The boring problem nobody warns you about
None of this is complicated on its own. The trouble is that vaccines and dewormers run on overlapping but different timelines, and a fading paper checklist on the fridge is genuinely hard to read three weeks in. You end up texting your vet to ask what you already did.
That's the exact gap I built a habit around: log each dose the day it happens, with the date, and let something remind you when the next one is due rather than trying to hold it all in your head. I keep ours in a simple free tracker, PetHealthLog, and there's a puppy vaccination schedule by week layout there that maps cleanly onto the timeline above. Whether you use an app, a spreadsheet, or a calendar with alerts, the principle is the same: write it down when it happens, not when you remember.
A few questions worth asking your vet
You don't have to memorize the guidelines, but it helps to walk into the clinic with these:
- Given my puppy's age now, when is the next shot actually due?
- Are there noncore vaccines you'd recommend for my area, like Lyme or Bordetella?
- Which dewormer are we using, and what's the schedule after the early doses?
- When should this puppy be spayed or neutered, and does that change anything above?
Noncore vaccines, by the way, are the ones tied to lifestyle and geography rather than blanket recommendation. A dog that hikes in tick country or boards at a kennel may need protection a city apartment dog never will.
The short version
The first few months are front-loaded with shots and dewormers because a puppy's borrowed immunity is fading and parasites show up early. Core vaccines repeat every few weeks until 16 weeks, rabies lands by 16 weeks and is required by law, and deworming starts at 2 weeks on its own cadence. Keep a dated log of what actually happened, lean on reminders instead of memory, and bring specific questions to your vet. The paper-on-the-fridge method is what fails, not you.
This is general information, not veterinary advice. Your vet's schedule for your specific puppy always wins.
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