Intestinal Worming for Dogs and Cats in Australia: Why It Matters More Than Most Pet Owners Realise

 

Many pet owners are surprised to learn that some intestinal worms can infect both pets and people. Even indoor pets can be exposed to worms through contaminated soil, fleas, raw meat, hunting behaviour, or contact with other animals.

​

Regular intestinal worm prevention is one of the simplest ways to protect your pet's health and reduce the risk of zoonotic disease (diseases that can spread from animals to humans).

​

As a veterinarian with over 15 years of experience treating dogs and cats in Brisbane, I still diagnose intestinal worms in pets every year, including pets whose owners believed they were not at risk.

​

This guide explains the common intestinal worms found in Australia, how pets become infected, recommended worming schedules, and why prevention remains important even for indoor pets.

​

Fortitude Valley Vet has proudly cared for pets across Brisbane's inner north for more than a decade. We regularly welcome patients from Fortitude Valley, Newstead, Teneriffe, New Farm, Paddington, Kelvin Grove, Hamilton, Bowen Hills, Spring Hill, Herston and surrounding suburbs seeking affordable veterinary care, pet dental treatment, vaccinations, puppy and kitten health checks, surgery and emergency veterinary services.

​

What Are Intestinal Worms?

​

Intestinal worms are parasites that live within your pet's digestive tract. They survive by stealing nutrients from the host animal and can cause a range of health problems depending on the species involved and the severity of infection.

Some worm infestations cause obvious symptoms, while others remain undetected for months.

The most common intestinal worms found in Australian dogs and cats include:

• Roundworms

• Hookworms

• Whipworms

• Tapeworms

 

Each worm species has a different life cycle and method of transmission.

 

Roundworms

Roundworms are among the most common intestinal parasites seen in puppies and kittens.

Adult worms resemble strands of spaghetti and live within the small intestine.

 

How Pets Get Roundworms

 

Dogs and cats may become infected through:

• Infected soil

• Eating infected prey animals

• Drinking contaminated water

• From their mother before birth (puppies)

• Through milk during nursing

 

Symptoms of Roundworms

 

Signs may include:

• Pot-bellied appearance

• Vomiting

• Diarrhoea

• Poor growth

• Weight loss

• Visible worms in faeces or vomit

Heavy infestations can be particularly dangerous for young animals.

 

Can Humans Catch Roundworms?

 

Yes.

 

Roundworm eggs shed in pet faeces can contaminate soil and gardens. Humans, particularly children, can accidentally ingest these microscopic eggs.

 

Although uncommon, human infections can occasionally cause serious health problems if migrating larvae affect organs or the eyes.

​

Hookworms

 

Hookworms are small but potentially dangerous parasites that attach to the intestinal wall and feed on blood.

 

How Pets Get Hookworms

 

Pets can become infected through:

• Contaminated soil

• Contact with infected faeces

• Larvae penetrating the skin

• Nursing from infected mothers

 

Symptoms of Hookworms

 

Common signs include:

• Anaemia

• Pale gums

• Weight loss

• Diarrhoea

• Weakness

• Poor growth in puppies and kittens

Young animals are particularly vulnerable because blood loss can occur rapidly.

 

Human Health Risks

 

Hookworm larvae can penetrate human skin, causing a condition known as cutaneous larval migrans, often appearing as itchy, winding tracks beneath the skin.

​

Whipworms

Whipworms are more commonly seen in dogs than cats.

These parasites live in the large intestine and can be difficult to detect because they shed eggs intermittently.

​

How Dogs Become Infected

​

Dogs acquire whipworms by swallowing eggs from contaminated environments.

The eggs are remarkably resilient and can survive in soil for years.

 

Symptoms of Whipworms

 

Signs may include:

• Chronic diarrhoea

• Blood in faeces

• Weight loss

• Straining to defecate

• Poor body condition

Because symptoms often mimic other gastrointestinal diseases, diagnosis may require repeated faecal testing.

 

Tapeworms

 

Unlike roundworms and hookworms, tapeworms require an intermediate host to complete their lifecycle.

Several different tapeworm species can affect Australian dogs and cats, and understanding the source of infection can help owners reduce their pet's risk.

​

Flea Tapeworm (Dipylidium caninum)

This is the most common tapeworm seen in suburban dogs and cats.

Pets become infected when they accidentally swallow an infected flea during grooming.

​

Signs of Infection

Many pets show no obvious symptoms, but owners may notice:

• Rice-like segments around the anus

• Segments on bedding

• Excessive licking of the rear end

• Scooting

Because fleas are required for transmission, effective flea control is an important part of preventing reinfection.

​

Taenia Tapeworms

Taenia species are typically acquired when dogs or cats eat infected prey animals or consume raw meat containing larval cysts.

Pets that hunt rodents, rabbits, lizards or are fed raw diets may have an increased risk of infection.

Most infections cause few clinical signs, although tapeworm segments may occasionally be visible in the faeces.

​

Hydatid Tapeworm (Echinococcus)

Hydatid disease is of particular concern because it can affect both animals and humans.

Dogs become infected by consuming infected offal from livestock or wildlife species carrying hydatid cysts.

Humans can become accidental hosts by ingesting eggs shed in dog faeces, potentially leading to cyst formation in organs such as the liver or lungs.

Fortunately, hydatid disease is uncommon in urban Brisbane pets but remains an important consideration for:

• Rural dogs

• Hunting dogs

• Working dogs

• Dogs fed raw offal

 

How Often Should Dogs and Cats Be Wormed in Australia?

 

One of the most common questions I hear in practice is:

​

"How often should I worm my pet?"

​

Current veterinary recommendations for most adult dogs and cats are:

 

Adult Dogs

​

Every 3 months for intestinal worms.

Some products combine intestinal worming with monthly protection against other parasites such as heartworm, fleas and ticks but as of 2026, there is no product that does all 4 types of intestinal worms, heartworm, fleas and ticks. 

 

Adult Cats

​

Every 3 months for intestinal worms.

Indoor cats still require routine worm prevention because insects, prey animals and contaminated materials can enter the home environment.

​

Puppy Worming Schedule

 

Puppies require more frequent treatment because they commonly acquire worms from their mother.

A typical schedule is:

• Every 2 weeks from 2 weeks of age until 12 weeks

• Monthly from 3 to 6 months

• Every 3 months thereafter

 

Kitten Worming Schedule

 

Kittens follow a similar schedule:

• Every 2 weeks from 2 weeks of age until 12 weeks

• Monthly until 6 months of age

• Every 3 months thereafter

 

Can Indoor Pets Get Worms?

 

Absolutely.

Many owners assume indoor pets are completely protected.

However, worms can still be introduced through:

• Fleas

• Shoes carrying contaminated soil

• Potting mix

• Raw meat diets

• Insects entering the home

• Hunting geckos, insects or rodents

Indoor pets generally have lower exposure risk but not zero risk.

​

What Happens If Worms Are Left Untreated?

 

Untreated worm infestations may lead to:

• Chronic diarrhoea

• Vomiting

• Weight loss

• Poor coat quality

• Anaemia

• Intestinal inflammation

• Reduced growth in young animals

Severe infestations can occasionally cause intestinal obstruction or life-threatening illness, particularly in puppies and kittens.

​

Should My Pet Have Faecal Testing?

 

Routine faecal examinations can be useful in some pets, particularly:

• Pets with chronic diarrhoea

• Pets that hunt

• Raw-fed pets

• Multi-pet households

• Newly adopted animals

However, faecal testing should not replace routine preventative worming because parasites may not always be detected in every sample.

​

Dr Nic's Advice

 

In my experience, intestinal worms remain one of the most underestimated health risks affecting Australian pets.

Many infected pets appear completely healthy, yet continue shedding worm eggs into the environment.

Regular preventative worming is far safer, easier and less expensive than treating a significant parasite burden after it develops.

For most Australian dogs and cats, a simple routine of intestinal worm prevention every three months provides excellent protection for both pets and their families. As of 2026, there is no oral product that does all 4 types of worms, heartworm, fleas and ticks for dogs. 

​

Read Dr Nic's Comprehensive Guide on Intestinal Worming Guidelines for Dogs and Cats

​

If you're unsure whether your pet is up to date with their parasite prevention, call our friendly team. They can recommend a product tailored to your pet's lifestyle, age and risk factors.