Flea, Tick and Worming Schedule for Dogs and Cats

This article is general information only and not veterinary advice. Parasite product choice depends on your pet’s species, weight, age, health and location — and some products safe for dogs are lethal to cats. Always follow your vet’s recommendation and the product label. Never administer medications without veterinary guidance. If your pet is unwell or it’s an emergency, see your vet.

A reliable flea, tick and worming schedule for dogs and cats is the cheapest health insurance in Australian pet ownership. Our climate lets parasites thrive year-round in most of the country: fleas never take a winter holiday in Brisbane or Darwin, paralysis ticks kill pets along the entire east coast, and intestinal worms are everywhere dogs and cats sniff, lick and hunt. The good news is that modern preventives are effective, easy to use, and far cheaper than treating the diseases they prevent. This guide sets out what to use, when, and the Australian-specific risks that change the schedule.

Why Australia Needs Year-Round Parasite Prevention

In much of Australia, there is no “parasite season” — there’s just parasites, always — a reality that surprises owners moving from cooler climates. Warmer winters mean flea populations persist through the year in Queensland, northern NSW, WA and the NT, and even in Melbourne and Hobart, indoor heating keeps fleas cycling through winter. Paralysis ticks, once considered a spring-summer problem, are now reported year-round by vets and wildlife hospitals, with cases even through winter. Intestinal worms don’t care about seasons at all. The old habit of “worming when I remember” leaves gaps that parasites exploit — a schedule you actually follow beats a perfect schedule you don’t.

Flea, Tick and Worming Schedule: Fleas

Dogs

Use a registered flea preventive every month, all year — or a longer-acting option per its label duration (some chews and collars cover 8–12 weeks; one injectable option for dogs lasts 12 months and is given by your vet). Modern options include oral chews (isoxazoline class), spot-ons, and collars. Your vet will match the product to your dog’s weight, age, lifestyle and any seizure history (a small number of dogs are sensitive to certain flea-chew classes — disclose any neurological history to your vet).

Cats

Monthly spot-ons or chews formulated specifically for cats, year-round. This warning can’t be overstated: some dog flea products (particularly permethrin-based) are fatally toxic to cats. Never apply a dog product to a cat, and in multi-pet households, keep treated dogs away from cats until the product dries. If a cat is ever exposed, it’s an emergency — see your vet immediately.

The environment matters too

Fleas spend most of their life cycle off the animal — eggs and larvae in bedding, carpets and soil. If you’re fighting an active infestation: wash pet bedding hot weekly, vacuum thoroughly (and empty the vacuum — flea pupae survive in bags), and treat all pets in the household simultaneously. One untreated pet reinfests everyone. Severe infestations may need an environmental treatment — ask your vet rather than reaching for supermarket bug bombs, many of which are ineffective against pupae and risky around pets.

Flea, Tick and Worming Schedule: Ticks (The Serious One)

Australia’s paralysis tick (Ixodes holocyclus) is one of the world’s most dangerous ticks to pets — the neurotoxin causes ascending paralysis that can kill within days, and treatment averages ~$2,400 per case (PetSure 2022 claims data) — severe cases can cost far more. Brown dog ticks spread ehrlichiosis, now established in northern Australia. Tick prevention isn’t optional on the east coast — it’s life-or-death.

Tick zones

Paralysis ticks occur along the east coast from far north Queensland to Victoria, concentrated in bushy coastal areas but increasingly reported inland and south, with cases now seen in southern Victoria and even Adelaide. If you live east of the Great Dividing Range, assume risk. Travelling with pets? Check the tick status of your destination — dogs holidaying from Perth to Byron Bay are classic tick-paralysis cases because their owners didn’t know.

The prevention schedule

• Dogs in tick areas: a registered tick preventive used exactly per label intervals, year-round — most commonly an oral chew given every 4–12 weeks depending on product, or a tick collar replaced per label. No gaps: a single missed dose in tick season can be fatal.
• Dogs outside tick areas: discuss with your vet — brown dog tick and bush tick prevention still matters in much of the country.
• Cats: options are more limited than for dogs; use a cat-registered tick product per label and daily tick searches — cats groom ticks off less reliably than you’d hope, and they’re just as vulnerable to paralysis.
• Daily tick checks for all pets in risk areas: run your fingers against the fur over the whole body — head, ears, neck, armpits, groin, between toes. Ticks can be tiny (larvae are pinhead-sized). If you find one, see our tick paralysis guide for removal and aftercare — and remember symptoms can develop up to 24–36 hours after removal.

Worming: The Schedule

Intestinal worms (roundworm, hookworm, whipworm, tapeworm)

• Puppies: worm every 2 weeks from 2 weeks of age until 12 weeks, then monthly until 6 months — your vet usually starts this before the puppy comes home.
• Kittens: similar intensive schedule — every 2 weeks until 12 weeks, then monthly to 6 months.
• Adult dogs and cats: at least every 3 months, for life. Dogs in high-risk situations (raw meat diets, hunting, heavy park use) may need monthly — ask your vet.

Use a combination all-wormer covering roundworm, hookworm, whipworm and tapeworm — single-ingredient products leave gaps. Many monthly flea/tick/heartworm combination products also cover intestinal worms; check the label so you’re not double-dosing or missing a category.

Heartworm

Heartworm is transmitted by mosquitoes and is present across much of Australia, particularly the north and east. Prevention is year-round, for life, starting by 12 weeks of age:

• Dogs: monthly chews/spot-ons, or a yearly injection given by your vet (popular for its set-and-forget reliability — no missed doses). An annual heartworm test is recommended even on prevention.
• Cats: monthly heartworm prevention is available and recommended in endemic areas — cats get heartworm too, and there’s no approved adult treatment for cats, so prevention is everything.

Heartworm treatment in dogs is expensive, prolonged and risky; prevention costs a fraction. This is one of the clearest cost-benefit wins in all of pet care.

Putting It Together: The Annual Schedule at a Glance

• Monthly (all year): flea prevention (dogs and cats); heartworm prevention if using monthly products; intestinal worming for high-risk pets.
• Every 4–12 weeks (all year, per product label): tick prevention for dogs in tick areas — set phone reminders; gaps kill.
• Every 3 months (all year): all-wormer for adult dogs and cats on standard risk.
• Yearly: vet-administered heartworm injection (dogs, if chosen); annual heartworm test; review the whole parasite plan with your vet.
• Daily (tick areas): hands-on tick check of every pet.

Phone reminders are the unsung hero of parasite prevention — set recurring calendar alerts for every product’s due date, and keep a photo of each product’s packaging on your phone so you can confirm the active ingredient and interval anywhere. The most common cause of “but I use prevention!” tick paralysis cases is a dose given two weeks late. Confirm the product and interval with your vet before starting any new preventive.

Costs: Prevention vs Treatment

Annual parasite prevention for a medium dog typically runs a few hundred dollars across flea, tick, worming and heartworm products (October 2026 snapshots vary by brand and retailer — compare Pet Circle, Petbarn and your vet’s prices; vet clinics sometimes price-match). A single tick paralysis treatment averages ~$2,400. A single parvovirus-level disaster aside, the maths is overwhelmingly in favour of prevention — and that’s before counting the suffering prevented. Buying in 6- or 12-month packs usually cuts the per-dose cost meaningfully.

Safety Rules That Matter

• Species-specific products only. Dog products on cats can kill. Cat products on dogs may underdose.
• Dose by current weight. Puppies and kittens outgrow dose bands fast — reweigh and step up on schedule.
• Follow label intervals exactly — “every 4 weeks” means 4 weeks, not “roughly monthly-ish”.
• Tell your vet about seizure history before starting isoxazoline-class flea/tick chews.
• Store products safely — chews are flavoured and dogs will eat the whole box if given access. Keep them locked away like the medications they are.
• Never combine products without vet advice — some combinations double-dose the same active ingredient.
• Report adverse reactions to your vet and the APVMA — it improves product safety for everyone’s pets.
• New pets get a vet check first. Rescue and rehomed pets often arrive with unknown parasite histories — a vet visit, faecal test and tailored catch-up schedule beats guessing. Quarantine new arrivals from existing pets until the vet gives the all-clear.

Flea, Tick and Worming Schedule: Puppies, Kittens and Seniors

Young and old pets need schedule tweaks. Puppies and kittens: start flea prevention at the age on the product label (many start at 8 weeks — never use adult dog products on young pups), worm every 2 weeks until 12 weeks then monthly to 6 months, and begin heartworm prevention by 12 weeks. Their rapid weight gain means re-weighing and stepping up dose bands monthly — an underdosed puppy is an unprotected puppy. Senior pets: don’t retire the schedule — older pets’ immune systems are weaker, making parasites more dangerous, not less. But do review product choices with your vet: seniors with liver or kidney disease, or on multiple medications, may need different actives. Breeding animals: only use products specifically labelled safe for pregnant/lactating animals, and worm nursing mothers alongside their litters (roundworm larvae pass through milk). Whatever the life stage, the principle holds: the schedule adapts, but it never stops.

FAQs: Flea, Tick and Worming Schedule

Related: pet insurance compared, dog desexing costs, pet cost calculator. The RSPCA’s parasite guidance is at rspca.org.au.