Puppies are usually wormed very frequently at first, then the interval gradually stretches out as they grow.

Typical puppy worming schedule

Most vet- and pet-health sources recommend something close to this pattern (always confirm the exact plan with your own vet):

  • From 2–3 weeks old until 12 weeks: worm every 1–2 weeks, depending on the product and your vet’s advice.
  • From 12 weeks to 6 months: worm about once a month.
  • After 6 months: move onto an adult schedule, often every 3 months, though some vets recommend every 1–3 months based on lifestyle and local risk.

Why puppies need frequent worming

Puppies are at higher risk because:

  • They can be born with worms or pick them up from their mother’s milk.
  • Their immune systems are still developing, so worms can cause weight loss, a pot-bellied look, diarrhoea, anaemia, and poor growth.

Treating regularly helps protect both the puppy and the people in the home, since some dog worms can infect humans.

Adult dog vs puppy schedule

Once your puppy is on an adult schedule, the timing often depends on risk level.

  • Low-risk, mostly indoor, well-controlled dogs: commonly every 3 months.
  • Higher-risk dogs (outdoors a lot, scavenging, around children or vulnerable people): many experts now suggest monthly worming.

Important safety notes

Because products differ, always:

  • Use a puppy-appropriate dewormer and correct weight-based dose.
  • Check how often the specific product should be given; some “all-in-one” preventatives follow a monthly schedule.
  • Ask your vet if your puppy has vomiting, severe diarrhoea, blood in stool, is very lethargic, or you’re unsure when the last dose was.

If in doubt about “how often do you worm a puppy” for your exact pup, bring their age, weight, and product name to your vet and have them map out a written schedule.

Information gathered from public forums or data available on the internet and portrayed here.