Worming Schedule for Puppies, Dogs, Kittens and Cats

Key Takeaways

• Puppies and kittens should be dewormed every two weeks until three months old, then monthly until six months, following AVP guidelines. After six months, begin adult protocols and use a heartworm preventive that also covers hookworms and roundworms.
• Adult dogs and cats require regular deworming based on their parasite exposure, and breeding females should be treated before mating, at birthing and while nursing.
• Newly acquired pets should be dewormed immediately, again in two weeks and then placed on the standard schedule.
• Over the counter options such as Nemex-2 for dogs and Drontal Tablets for cats treat common worms, while prescription products like Droncit, Panacur and Drontal Plus offer broader protection.
• Flea control is essential because fleas transmit tapeworms, and both the pet and environment must be treated to break the cycle.

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Worms are one of the most common health issues in puppies and kittens, and the good news is they're also one of the most treatable. Hookworms and roundworms are the parasites seen most often in young pets, and both can cause real harm if left untreated, from poor growth to anemia to digestive trouble.

A consistent worming schedule for your dog or cat is the simplest way to stay ahead of the problem. This guide walks through the current recommended deworming schedule for puppies, kittens, adult dogs and cats, and senior pets, based on guidelines from the Companion Animal Parasite Council (CAPC), along with the products vets and pet owners commonly use at each stage.

Deworming Schedule for Puppies and Kittens

Puppies and kittens follow the same early schedule. CAPC recommends starting treatment at 2 weeks of age for both, since young animals can pick up parasites from their mother before or shortly after birth, and their immune systems aren't yet equipped to handle a heavy worm burden.

• 2 to 8 weeks: Deworm every 2 weeks.
• 2 to 6 months: Deworm monthly.
• 6 months and up: Transition to an adult schedule, ideally a monthly, year-round broad-spectrum parasite preventive that also covers heartworm.

Here's how that breaks down by life stage, including adult and senior pets:

Life Stage	Age Range	Deworming Frequency	Notes
Puppy / Kitten (early)	2 to 8 weeks	Every 2 weeks	Start at 2 weeks of age for both puppies and kittens
Puppy / Kitten (growing)	2 to 6 months	Monthly	Continue monthly treatments through this stage
Adult, on year-round prevention	6 months and up	Monthly	Best practice: a monthly broad-spectrum product covering heartworm, intestinal parasites, fleas, and ticks
Adult, without monthly prevention	6 months and up	Every 3 months	Minimum recommended frequency if a monthly product isn't feasible, plus fecal exams 2 to 4 times a year
Senior	7+ years (varies by species/breed)	Monthly preferred	Same baseline as adults. Pair with regular vet exams and fecal testing, since older pets may have more health issues to track

Deworming Guidelines for Adult and Newly Acquired Pets

For adult dogs and cats, CAPC's preferred approach is simple: keep every pet on a monthly, broad-spectrum parasite preventive year-round, covering heartworm, intestinal parasites, fleas, and ticks. If a monthly product isn't realistic for your pet, the fallback recommendation is to deworm at least four times a year, along with fecal exams two to four times a year to catch anything in between.

Breeding females need a bit of extra attention. Many vets recommend keeping pregnant and nursing dogs and cats on parasite control throughout pregnancy and lactation, since certain worms can pass to puppies and kittens before or shortly after birth. Not every dewormer is labeled safe for pregnant animals, though, so this is one to confirm with your veterinarian rather than treat on your own.

For newly acquired pets, ask the previous owner for the deworming history if you can get it. If you can't, treat right away, repeat the treatment in 2 weeks, and then move onto the regular schedule for their age.

Choosing a Dewormer: Over-the-Counter and Prescription Options

Several effective dewormers are available without a prescription. Nemex-2 treats roundworms and hookworms in dogs. Drontal Tablets for Cats covers tapeworms, roundworms, and hookworms in cats and kittens. Safe-Guard Canine Dewormer is another non-prescription option, treating roundworms, hookworms, whipworms, and tapeworms in dogs over 6 weeks old. It's still worth having your vet confirm which parasites your pet is actually dealing with before you pick a product, since not every dewormer treats every type of worm.

Several prescription options cover a broader range of parasites. Droncit Canine targets tapeworms specifically. Panacur Granules treats roundworms, hookworms, whipworms, and tapeworms in dogs. Drontal Plus Taste Tabs and Drontal Plus Tablets for dogs cover that same broad range in a chewable or tablet form. Your veterinarian can recommend the best fit based on your pet's age, weight, and health history. This is only a partial list of the dewormers available for dogs and cats.

One safety note: some of these same active ingredients also show up in dewormers made for horses and livestock. Never substitute a livestock dewormer for a product labeled for dogs or cats. Livestock formulas are far more concentrated and can cause a dangerous overdose in a pet.

Don't Forget Fleas

Treating your pet for worms is only part of the picture. Fleas are a vector for tapeworm, carrying it from one host to the next, so flea control is really parasite control. Be sure to treat your pet and your pet's environment for fleas at the same time. See Control Fleas in 3 Easy Steps for a simple plan to break the flea life cycle.

Frequently Asked Questions

How often should adult dogs be dewormed?

Adult dogs on a year-round broad-spectrum preventive are effectively dewormed every month. If your dog isn't on a monthly product, most vets recommend deworming at least four times a year, along with fecal exams once or twice a year to check for parasites in between.

Can I deworm my cat at home?

Yes. Dewormers like Drontal Tablets for Cats are available without a prescription and can be given at home. It's still worth having your vet confirm which parasites your cat is dealing with first, since not every dewormer treats every type of worm.

Do indoor cats need to be dewormed?

Yes. Indoor cats can still pick up worms from fleas, insects, rodents, or eggs tracked in on shoes and other pets. Roundworms can also pass from a mother cat to her kittens regardless of whether she goes outside, so indoor cats still need regular parasite control.

What are signs my puppy has worms?

Common signs include a pot-bellied appearance, poor weight gain, a dull coat, diarrhea, vomiting, and visible worms or rice-like segments in the stool. Some puppies with a heavy worm burden show no obvious symptoms at all, which is exactly why sticking to a regular deworming schedule matters even when a puppy looks healthy.

Is it safe to deworm a pregnant dog or cat?

Many vets recommend keeping pregnant and nursing dogs and cats on parasite control, since certain worms can pass to puppies and kittens before or shortly after birth. Not every dewormer is labeled safe during pregnancy though, so this is one to confirm with your veterinarian rather than treat on your own.

Can humans get worms from pets?

Yes, hookworms and roundworms in particular can spread to people, usually through contact with contaminated soil or pet waste. Children are at higher risk since they're more likely to put their hands in their mouths after contact with soil or a sandbox. Regular deworming, prompt cleanup of pet waste, and handwashing are the best ways to lower that risk.

What's the difference between over-the-counter and prescription dewormers?

Over-the-counter dewormers, like Nemex-2 or Safe-Guard, typically treat a narrower set of parasites, such as roundworms and hookworms. Prescription dewormers, like Drontal Plus or Panacur, often cover a broader range, including tapeworms and whipworms, and your vet can help match the product to what your pet actually has.

Sources: Companion Animal Parasite Council (capcvet.org), and Valley Vet Supply's current dewormer catalog.

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