New Puppy in NJ — the first 90 days

    Week-by-week vet schedule, NJ-specific vaccine timing, potty training, and yard waste management. Written from the perspective of a service that has cleaned up after thousands of NJ puppies.

    Updated 2026-05-17 · ~9 min read · Central & South Jersey

    NJ-specific things to know: NJ has endemic parvovirus in green spaces (no sidewalk walks until two weeks after the third DHPP), endemic Lyme/tick disease (prevention starts at 8 weeks), and endemic heartworm (prevention must be active by May). These three timelines drive everything below.

    Week 1Days 1–7

    Settle in, set the schedule, do not skip the vet visit

    🩺 Vet

    • ·First wellness exam within 5 days of bringing the puppy home (most NJ vets require this for the breeder/shelter health guarantee).
    • ·Confirm vaccination records: most 8-week puppies have only their first DHPP. The next vaccines are due weeks 10–12.
    • ·Fecal test on day 1 — roundworm and giardia are extremely common in puppies, even from reputable breeders.

    🎓 Training

    • ·Crate introduction (door open, fed inside, never used as punishment).
    • ·Name response, sit, look-at-me — 3 sessions/day, 90 seconds each.
    • ·Decide the pee-spot in the yard and use the same path every time.

    🐾 Potty & Yard

    • ·Out every 60 minutes during the day, immediately after eating, immediately after waking, and right before sleep.
    • ·Expect 5–6 piles per day from a small puppy, 7–9 from a large breed.
    • ·Pick up every pile the same day — fresh puppy waste contains the highest parasite-egg load and dries into the lawn fast.

    🌳 NJ-specific

    • ·NJ municipal scoop laws apply to puppies too — even in your own front yard if it's visible from the street. Check your township's specific ordinance.
    • ·Lyme-vector tick season starts as early as March in South Jersey. Ask the vet about Nexgard / Bravecto eligibility (most start at 8 weeks or 4 lbs).
    Weeks 2–4Days 8–28

    Second vaccine, socialization window, walk schedule

    🩺 Vet

    • ·Second DHPP at week 10–12. Bordetella (kennel cough) if planning daycare or boarding within 6 months.
    • ·First nail trim — most vets and groomers will do it free at this stage to build comfort.
    • ·Heartworm prevention starts at 8 weeks in NJ (heartworm is endemic statewide — this is not optional).

    🎓 Training

    • ·Socialization window closes around week 16. Expose to 5+ new people, surfaces, and sounds per week.
    • ·Leash introduction in the yard before sidewalks.
    • ·Reward eye contact at every meal — pays off forever.

    🐾 Potty & Yard

    • ·Out every 90 minutes — bladder control extends quickly during this phase.
    • ·Pile count drops to 4–5/day for most breeds.
    • ·Start picking up immediately, not at end of day — the habit sets your long-term yard hygiene.

    🌳 NJ-specific

    • ·DO NOT walk on public sidewalks until 2 weeks after the third DHPP shot (typically week 18). Parvovirus is endemic in NJ green spaces, especially Central Jersey parks.
    • ·Backyard play is fine; dog parks are not — even fenced ones.
    Weeks 5–8Days 29–56

    Third vaccine, structured walks, yard becomes the main play space

    🩺 Vet

    • ·Third DHPP at week 14–16. Lepto (recommended in NJ — bacterial disease from wildlife urine, present statewide).
    • ·Rabies at 12–16 weeks (NJ law requires by 7 months; most vets do it at 16 weeks).
    • ·First flea/tick prevention dose if not already started.

    🎓 Training

    • ·Loose-leash walking in the yard, then driveway, then sidewalk after vaccinations clear.
    • ·Drop-it and leave-it commands — critical for NJ yards where roundworm eggs and dead small animals are real hazards.
    • ·Start brushing teeth daily (yes, daily) — periodontal disease is the #1 health issue in adult dogs.

    🐾 Potty & Yard

    • ·Out every 2–3 hours. Bladder control matches adult capacity by week 16.
    • ·Pile count down to 3–4/day for most breeds.
    • ·Yard cleanup cadence: still daily for the first 8 weeks of puppy ownership. After that, weekly is sustainable for most NJ households.

    🌳 NJ-specific

    • ·Tick check after every yard session, especially nape, ears, between toes. NJ deer-tick density is among the highest in the country.
    • ·Mosquito exposure starts in May in NJ — heartworm prevention must be active by then.
    Weeks 9–12Days 57–84

    Full vaccination, public exposure starts, lock in routines

    🩺 Vet

    • ·Final puppy vaccine series complete by week 16–18.
    • ·Schedule the spay/neuter consult (typically 6–9 months for small breeds, 12–18 months for large breeds — recommendations vary).
    • ·Set up the lifetime vet schedule: annual wellness, annual heartworm test, annual fecal test, annual dental.

    🎓 Training

    • ·First puppy class — week 12+ is the sweet spot (boosters in, socialization still open).
    • ·Recall (come) drilled in the yard with high-value treats. Never call the dog for something they won't like.
    • ·Begin alone-time tolerance: short crate sessions while you're in the next room, building to 1–2 hours by week 12.

    🐾 Potty & Yard

    • ·Out every 3–4 hours during the day, full overnight by week 12 for most breeds.
    • ·Pile count stabilizes at 2–3/day.
    • ·If you're working full-time outside the home: midday walk or yard break is needed until at least 6 months.

    🌳 NJ-specific

    • ·Sidewalks, neighborhood walks, and low-traffic trails are now safe with full vaccinations.
    • ·Dog parks are still risky for any puppy under 6 months — focus on 1-on-1 supervised playdates instead.

    Want the printable week-by-week checklist?

    Printable PDF with the vet schedule, vaccine cutoffs, and yard-cleanup cadence by week. Stick it on the fridge for the first 90 days.

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