Pets and Parasites—Intestinal Worms

Worms might be small, but they can cause big problems for our pets. Intestinal worms are a common health concern in both cats and dogs, and left untreated, they can lead to a range of issues—from weight loss and vomiting to more serious conditions such as anaemia and intestinal blockages.

Thankfully, prevention is straightforward and we have access to a range of reliable products to help protect our pets. Here's what you need to know.

Types of Intestinal Worms in Pets

Several types of intestinal worms can affect cats and dogs in Australia:

• Roundworms – Common in puppies and kittens, and can be passed from mother to young.

• Hookworms – These can cause bloody diarrhoea and are especially dangerous in young animals.

• Whipworms – Found in dogs, these can cause chronic diarrhoea and weight loss.

• Tapeworms – Most commonly the flea tapeworm (Dipylidium caninum), which is spread by ingesting infected fleas. Another type, Echinococcus granulosus, can be transmitted to humans and cause hydatid disease.

Symptoms of Worm Infestation

Some pets show no signs of worms at all, while others may display:

• Diarrhoea (sometimes with blood or mucus)

• Vomiting

• Weight loss despite normal appetite

• Scooting or dragging the bottom

• A pot-bellied appearance (especially in puppies and kittens)

• Poor coat condition

• Visible worms in vomit or stools

Why Regular Worming Matters

Intestinal worms don’t just affect your pet’s health—they can also be a risk to your family. Some worms, such as roundworms and hookworms, are zoonotic, meaning they can be passed to humans, especially children.

Routine deworming is vital not just for your pet’s health, but for public health too.

How Often Should You Worm Your Pet?

• Puppies and kittens: Every 2 weeks until 12 weeks of age, then monthly until 6 months.

• Adult dogs and cats: Every 3 months for life.

Recommended Worming Products

Here are some of the most commonly recommended products by Australian vets:

For Dogs:

• NexGard SPECTRA® – A popular monthly chew that treats fleas, ticks, heartworm and most intestinal worms.

• Drontal® Allwormer – Treats all major intestinal worms; available in tablets and chews.

• Milbemax® – Monthly tablet for puppies and small dogs, treats intestinal worms and heartworm.

• Interceptor Spectrum® – Monthly chew that protects against intestinal worms and heartworm.

For Cats:

• Profender® – A convenient topical spot-on that treats all major intestinal worms.

• Milbemax® for Cats – Small tablets that treat intestinal worms and can help prevent heartworm when given monthly.

• Revolution Plus® – A spot-on treatment for fleas, ticks, mites, heartworm prevention and some intestinal worms (not tapeworm).

Tips for Effective Worm Prevention

• Use the correct product for your pet’s weight and age.

• Be consistent with your dosing schedule—set reminders if needed.

• Treat all pets in the household at the same time.

• Control fleas—especially important to prevent tapeworm.

• Clean up pet waste promptly to reduce environmental contamination.

When to See the Vet

If your pet is showing symptoms of worms or you're unsure whether their current prevention regime is effective, it’s time for a vet visit. Our vets can perform a faecal test or recommend a change in worming routine based on your pet’s lifestyle.

In Summary

Worms are a silent threat that can impact your pet’s health and your family's safety. Prevention is simple, effective and affordable—with options to suit every pet and family. If you’re unsure which product is best, have a chat with our vets—we’re here to help keep tails wagging and whiskers twitching in good health.