Choosing a monthly heartworm preventative can feel overwhelming, especially when you’re trying to balance protection, ease of use, and a routine you can stick to. Heartgard Plus is a popular pick for many Australian dog owners because it’s a monthly chew that fits neatly into everyday life.
This guide explains what Heartgard Plus is designed for, why it’s commonly chosen, and the practical checkpoints to consider before you buy. It’s written for dogs (not cats) and focuses on safe, label-aligned, vet-advised use in Australia.
What Heartgard Plus is (and who it’s for)
Heartgard Plus is a monthly chew formulated for dogs to help prevent heartworm disease and to help manage certain common intestinal worms. It’s designed to be part of a regular parasite prevention plan, particularly in areas where mosquitoes are active.
Important: Heartgard Plus is for dogs only—it’s not a product for cats. If you have multiple pets at home, store products separately and double-check labels so each animal gets the correct species-specific treatment.
In Australia, heartworm prevention is widely considered a year-round priority for many dogs. Mosquito activity can spike during warm, humid periods (think coastal Queensland summers, muggy nights after rain, and mild stretches in parts of NSW and WA), but risk doesn’t always disappear in cooler months—especially for dogs that spend time outdoors at dawn and dusk.
To see the available options in one place, you can browse Heartgard Plus by size range and pack type.
Why dog owners keep coming back
Most repeat buyers aren’t looking for complicated routines—they want something practical that their dog will take reliably, and a schedule they can maintain month after month.
- Chew format that can be easier to give: Many dogs accept chews more readily than other formats, which helps owners stay consistent.
- One monthly date is straightforward: A predictable calendar rhythm reduces confusion in busy households.
- Supports more than one parasite concern: Owners often like that their heartworm prevention routine can also help manage certain intestinal worms as described on the label.
- Easy to keep on hand: Being able to repurchase with minimal fuss makes it easier to avoid gaps in coverage.
If you’re researching because you’ve had trouble sticking to a schedule in the past, the most practical “upgrade” is often choosing a product your dog accepts, then making the timing non-negotiable on your calendar.
Starting safely: vet advice, testing, and missed doses
In Australia, heartworm prevention products are commonly used with veterinary guidance. Before starting any heartworm preventative, it’s sensible to speak with your vet about your dog’s health, lifestyle, and travel history.
Heartworm testing matters. Dogs are typically heartworm-tested before beginning a preventative program, and testing may also be recommended if doses have been missed or if your dog’s heartworm prevention history is unclear (for example, newly adopted dogs or dogs with irregular protection).
Do not give heartworm prevention to a heartworm-positive dog without veterinary direction. If there’s any chance your dog could already have heartworm, your vet can advise the safest next steps, including whether testing is needed first.
Make it truly monthly. Heartworm prevention works best when it’s given on the same date each month, all year round. Pick a date you’ll remember (for example, the 1st or 15th) and build it into your household routine.
If a dose is late or missed: check the product label and contact your vet for advice on what to do next. Avoid guessing or “doubling up” without guidance. If you’re unsure when the last chew was given, your vet can help you work out a safe plan to get back on track.
Quick tip: Link your monthly reminder to an existing habit (for example, paying a bill or replacing a water filter) and note the date given on a shared calendar so everyone in the household can see it.
Is it right for your dog? Key considerations
Heartworm preventatives aren’t one-size-fits-all. The best option depends on your dog’s weight, age, health status, and what else you’re using to cover parasites in your area.
Start with life stage and current weight. Chews are selected by weight range. Puppies can grow quickly, and adult dogs can fluctuate with seasonal activity levels, desexing, or diet changes. Weighing your dog regularly helps ensure you’re choosing the correct product range on the label.
Consider your dog’s exposure. Dogs that spend lots of time outdoors at dawn/dusk, live near waterways, or are exposed to mosquitoes during humid weather may have higher risk. Travel can also change your risk profile—weekends away, camping, and visiting family across regions can all mean different mosquito pressure.
Fit it into your broader parasite plan. Heartworm prevention is one part of parasite protection. Many owners also use separate products for fleas and ticks as needed. The key is keeping your plan clear, avoiding unnecessary overlap, and following label directions and veterinary advice.
How to choose the right Heartgard Plus product
Most shoppers are trying to do three things: match the correct chew to their dog’s weight, choose a pack size that suits their organisation style, and reduce the chance of running out mid-routine.
- Confirm the right weight bracket: Use a recent weigh-in, especially for puppies, newly adopted dogs, and dogs close to a bracket edge.
- Choose a pack size you’ll actually finish: Larger packs can be convenient for organised households, while smaller packs can suit dogs that are rapidly growing or owners still building the habit.
- Think ahead for holidays and delivery lead times: Long weekends, school holidays, and end-of-year travel can disrupt routines—ordering early helps prevent gaps.
For current options and pack sizes, head to the Heartgard Plus range and select the chew that suits your dog’s weight bracket.
Buying tips: storage, reminders, and reordering
A good product is only effective when it’s used consistently. These simple steps help keep your monthly routine steady.
- Store it properly: Keep chews sealed and in a cool, dry place away from direct sunlight. Australian summer heat can be intense, so avoid leaving products in hot rooms or cars.
- Use a two-person check in shared homes: Write down the date and the person who gave it. This helps avoid missed months and accidental double-giving.
- Reorder before you run out: A practical rule is to reorder when you open your last month in the pack, so delivery delays don’t interrupt your schedule.
If you’re switching from a different routine, aim to be extra strict for the first two or three months. Once the date is locked in, it becomes much easier to maintain long-term.
Frequently Asked Questions
What worms does Heartgard Plus cover?
Heartgard Plus is intended to help prevent heartworm disease and to help manage certain common intestinal worms. For the exact list of worms it targets and any limitations, refer to the product label and speak with your vet, as parasite risks can vary by region and individual dog.
Do I still need flea and tick treatment as well?
Possibly. Heartworm prevention focuses on heartworm and specified intestinal worms, while flea and tick protection is typically managed with separate products. What your dog needs depends on your local parasite risks, lifestyle (bush walks, boarding, daycare), and veterinary advice. Keep your plan simple and follow label guidance to avoid overlap.
Can puppies use Heartgard Plus, and from what age?
Puppies can often start a heartworm prevention routine when they reach the appropriate age and weight range on the label. Because puppies grow quickly and may move between weight brackets, it’s a good idea to confirm timing and product selection with your vet.
What if my dog is between weight ranges?
Weigh your dog and choose the product that matches their current weight range on the label. If your dog is right on a borderline, is rapidly growing, or has any health concerns, check with your vet so you can select the most appropriate option.
How quickly does Heartgard Plus arrive in Australia?
Delivery time depends on your location and carrier, especially for regional areas. Ordering before your next monthly date is due helps keep your routine uninterrupted.
Ready to buy? Browse the full Heartgard Plus range and choose the right option for your dog’s weight and monthly routine.