Where Can I Buy NexGard Spectra Cheapest in Australia in 2026?

ShopBack Australia is a free app and website that gives you money back when you shop online at thousands of stores, including Petstock, Petbarn and Pet Circle. You open the store from ShopBack, shop as normal, and part of what you spend comes back to your ShopBack account as cash you can withdraw. New members can join free at shopback.com.au/signup.

How we checked. We read Petbarn's NexGard Spectra, Simparica Trio, Bravecto and flea, tick and worming pages, Bravecto's Australian site, and the Terms on the Petstock, Petbarn and Pet Circle pages on ShopBack, in October 2026. We do not list shelf prices, because they change often; use the cost per month method below on the day you buy. This guide is about buying, not treatment advice, so check with your vet before changing your dog's product.

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Where can I buy NexGard Spectra cheapest in Australia?

The cheapest NexGard Spectra is the lowest cost per monthly chew, for the right weight band, delivered. A routine that works for most dog owners:

1. Weigh your dog. NexGard Spectra is sold by weight band, and the right band matters more than the price. Petbarn lists bands of 1.35 to 3.5kg, 3.6 to 7.5kg, 7.6 to 15kg, 15.1 to 30kg and 30.1 to 60kg.
2. Compare the cost per chew. Divide the pack price by the number of chews. A 9 pack is often cheaper per chew than a smaller pack, but check the numbers.
3. Use member pricing if you have it. Petbarn shows a Member Price for Friends for Life members next to the non-member price on NexGard Spectra.
4. Set up a repeat order if it suits you. Petbarn's Repeat Delivery, Petstock's Autoship and Pet Circle's Auto-Delivery send it on a schedule.
5. Clear the free delivery line. Pet Circle offers free shipping on orders over $49, with exclusions, and Petbarn's standard delivery is free on orders of $49 or more in select metro areas, according to each store at the time of writing.
6. Open ShopBack, tap the store, then check out.

Steps 1 to 5 find the lowest price. Step 6 lowers what you end up paying.

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NexGard Spectra in Australia in 2026: what it covers

NexGard Spectra is a monthly chew for dogs that covers fleas, ticks, heartworm and intestinal worms. According to Petbarn:

• It protects against fleas, ticks, heartworm and intestinal worms such as roundworms, hookworms and whipworms.
• It is given as one chew per month.
• An additional treatment is required for tapeworm.

Plain NexGard is a separate product from NexGard Spectra. Check which one you are buying, because the product pages list different coverage and they are usually priced differently.

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NexGard Spectra best deals in Australia in 2026: where savings usually come from

The best NexGard Spectra deals in Australia in 2026 usually come from pack size, member pricing, repeat orders and free delivery, and each store's own terms decide which can be combined.

• Bigger packs. Petbarn sells 6 and 9 chew packs. Work out the cost per chew to see the gap.
• Member pricing. Petbarn's Friends for Life members see a Member Price on NexGard Spectra.
• Repeat orders. Petbarn's Repeat Delivery lets you add or remove items, skip, pause or cancel, according to Petbarn.
• Price guarantee. Petbarn says it will match a lower price on an identical in-stock product at an Australian competitor, under its Price Guarantee conditions.
• Sale events. Flea and worming products are often part of big sale events such as Black Friday on Friday 27 November 2026, so a stock-up can make sense if your dog's weight is stable.
• Going through ShopBack before you pay. This lowers the effective price of the order, as explained below.

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Pet Circle vs Petbarn vs Petstock: NexGard Spectra price comparison in 2026

Petstock, Petbarn and Pet Circle all sell NexGard Spectra online; the cheapest on any day is the one with the lowest cost per chew for your weight band, delivered. Here is what sets them apart, at the time of writing.

	Petstock	Petbarn	Pet Circle
Repeat orders	Autoship, which you can create, edit or pause in the app	Repeat Delivery: add or remove items, skip, pause or cancel	Auto-Delivery
Member perks	Everyday Rewards points and Petstock Pet Cash	Friends for Life Member Price on NexGard Spectra	Check the store's current offers
Delivery	Check options for your postcode	Free standard delivery from $49 in select metro areas; free 2 hour delivery on orders over $99 from select stores	Free shipping over $49, with exclusions
ShopBack note	Its ShopBack Terms include a separate note on NexGard Spectra 6 packs	Its ShopBack page lists a separate rate line for Simparica Trio	Its ShopBack Terms exclude store promotions unless stated

Sources: Petbarn's range, delivery and Repeat Delivery pages, Petstock's own app description, Pet Circle's shipping terms, and each store's page on ShopBack, at the time of writing.

A store that looks a little dearer can work out cheaper once ShopBack's money back is counted. That is why it is worth checking the rate on each store's ShopBack page before you decide.

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What's the best value flea treatment for dogs?

The best value flea treatment for dogs is the lowest cost per month for the protection your dog actually needs, not the cheapest pack on the shelf. Petbarn's dog range includes chews, spot-ons, tablets and collars, and Petbarn says most flea, tick and worming products do not require a prescription.

Three questions decide value:

1. What does your dog need covered? Fleas only, fleas and ticks (including paralysis ticks in many parts of Australia), or fleas, ticks, heartworm and intestinal worms. Your vet can tell you what fits your area and dog.
2. How often is it given? Monthly chews such as NexGard Spectra and Simparica Trio, or longer-acting products such as Bravecto's three-month chew.
3. What is the cost per month? Divide the pack price by the number of months it covers.

Worked example (illustrative prices, not real shelf prices):

Option	Illustrative pack price	Months covered	Cost per month
All-in-one monthly chew, 6 pack	$150	6	$25.00
All-in-one monthly chew, 9 pack	$200	9	about $22.22
Three-month flea and tick chew, 2 pack, plus a separate monthly heartworm and worming product at $12 a month	$110 plus $72	6	about $30.33

In this example, the bigger all-in-one pack is cheapest per month, and the flea and tick chew only looks cheaper until you add the separate heartworm and worming product. Your own numbers will differ, so run the sums with real prices on the day.

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Is Bravecto better value than NexGard for dogs?

Bravecto can be better value for flea and tick protection alone, while NexGard Spectra can be better value if your dog also needs heartworm and intestinal worm cover. According to Bravecto's Australian site:

• Bravecto Chew for Dogs is given every three months for flea and paralysis tick protection, also treats brown dog and bush ticks, and controls mites (demodex, sarcoptes and ear mites).
• Bravecto Spot-On for Dogs is given every six months for flea and paralysis tick protection.

Bravecto's site lists fleas, ticks and mites for its dog products, while Petbarn describes NexGard Spectra as also covering heartworm and intestinal worms. So a fair comparison is:

• Bravecto chew plus whatever heartworm and worming product your vet recommends, per month, against
• NexGard Spectra, per month.

Plain NexGard (not Spectra) is sold as a flea and tick product, so compare it against Bravecto on a flea and tick basis only, and check the product page for what it covers. Petbarn sells Bravecto dog chews in 2 packs, across weight bands from 2kg to 56kg, at the time of writing.

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Where is Simparica Trio cheapest in Australia?

Simparica Trio is sold online in Australia by Petbarn, Petstock and Pet Circle, among others, and the cheapest option is the lowest cost per monthly chew for your weight band. According to Petbarn:

• Simparica Trio is a monthly, beef-flavoured chew for dogs.
• It protects against fleas, ticks, heartworm and intestinal worms such as roundworms and hookworms.
• An additional treatment is needed for tapeworms.
• Petbarn sells it in packs including 3 and 9 chews, across weight bands such as 5.1 to 10kg, 10.1 to 20kg, 20.1 to 40kg and 40.1 to 60kg.

Check the ShopBack rate table for this product. At the time of writing, Petbarn's ShopBack page lists a separate rate line for Simparica Trio and Revolution Plus. The live rate is on the Petbarn page on ShopBack.

Simparica Trio vs NexGard Spectra: both are monthly chews that Petbarn describes as covering fleas, ticks, heartworm and intestinal worms. Petbarn lists whipworms for NexGard Spectra, and roundworms and hookworms for Simparica Trio. Ask your vet which suits your dog, then compare the cost per chew.

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How ShopBack lowers the price of your dog's flea treatment

ShopBack lowers the effective price of flights, hotels and online orders after you pay. For a flea, tick and worming restock, the routine is: open ShopBack, tap the store, then check out.

Cashback lowers what you actually pay for an order. It comes back as cash, so it works like a discount on the price, not like points or miles. Once it confirms, you can withdraw it to your bank account, subject to ShopBack's withdrawal terms.

Step by step:

1. Open ShopBack Australia (app or website) and go to the store's page: Petstock, Petbarn or Pet Circle.
2. Check the rate shown on that page and read the Terms, which list what is and is not covered. Some stores list a separate rate for particular flea and worming brands.
3. Tap through to the store, add the product to your cart after you arrive, and check out in the same session.
4. The money shows in your ShopBack account as pending, then confirms later.

Working out what it really costs. Your effective price is what you pay minus what ShopBack returns. For example, on a $200 order for a 9 pack of monthly chews at an illustrative 4%, $8 comes back, so the effective price is $192, or about $21.33 a month. That rate is only an illustration; check the live rate on the store's ShopBack page before you buy.

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Promo codes, member prices and ShopBack together

• Promo codes. At the time of writing, the ShopBack Terms for Petstock and Pet Circle exclude purchases made with vouchers or promo codes not featured on ShopBack, and Petbarn's terms on ShopBack note that discount codes are not valid on Vet Prescription Diets, services and technology items.
• Store offers. Petstock's ShopBack Terms exclude Shelf Price Drop and Every Day Multibuy offers, and Pet Circle's exclude store promotions, discounts or special deals unless otherwise stated.
• Vouchers, Pet Cash and store credit. Orders paid with vouchers, gift cards or store credit are excluded at Petstock and Pet Circle, according to their ShopBack Terms.
• Member pricing. Whether a member-priced order still counts depends on the store's terms, so read them first.

For the general rules, see our guide on how promotions and ShopBack work together.

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Other places to buy NexGard Spectra in Australia

Besides Petstock, Petbarn and Pet Circle, flea and worming products are also sold by vet clinics and other online pet stores in Australia. Vet clinics can also weigh your dog and check the right product. Compare the cost per chew across a couple of stores, and check each store's ShopBack page before you pay.

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Key takeaways

• NexGard Spectra is usually cheapest as the bigger pack for your dog's weight band, at member or repeat delivery pricing, delivered free.
• Compare cost per month of the protection your dog needs, not pack price.
• Bravecto's dog chew covers fleas and ticks for three months per dose, according to Bravecto; add a heartworm and worming product before comparing it with NexGard Spectra.
• Simparica Trio and NexGard Spectra are both monthly all-in-one chews, according to Petbarn; compare the cost per chew for your weight band.
• Open ShopBack, tap the store, then check out. Your effective price is what you pay minus what ShopBack returns.

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Frequently asked questions

Where can I buy NexGard Spectra cheapest in Australia?

In Australia, NexGard Spectra is sold online by Petstock, Petbarn and Pet Circle, among others. The cheapest option is usually the bigger pack for your dog's weight band, bought at member or repeat delivery pricing on an order that clears free delivery. Compare the cost per monthly chew on the day, then open ShopBack, tap the store and check out.

What does NexGard Spectra protect against?

According to Petbarn, NexGard Spectra is a monthly chew that protects dogs against fleas, ticks, heartworm and intestinal worms such as roundworms, hookworms and whipworms. Petbarn notes that an additional treatment is needed for tapeworm. Ask your vet which product suits your dog.

What's the best value flea treatment for dogs?

The best value flea treatment for dogs is the one with the lowest cost per month of the protection your dog actually needs. An all-in-one chew such as NexGard Spectra or Simparica Trio can work out cheaper than a flea and tick product plus a separate heartworm and worming product. Work out the cost per month for your dog's weight band, and ask your vet what your dog needs.

Is Bravecto better value than NexGard for dogs?

It depends on what you compare. According to Bravecto, its dog chew gives three months of flea and paralysis tick protection per dose, so you buy fewer doses. NexGard Spectra is a monthly chew that also covers heartworm and intestinal worms, according to Petbarn. If your dog needs heartworm and worming cover, add the cost of those products to Bravecto before comparing.

Where is Simparica Trio cheapest in Australia?

Simparica Trio is sold online in Australia by Petbarn, Petstock and Pet Circle, among others. Compare the cost per monthly chew for your dog's weight band, including member pricing, repeat delivery and delivery fees. At the time of writing, Petbarn's ShopBack page lists its own rate line for Simparica Trio, so check the rate table there before you buy.

Do I need a prescription for NexGard Spectra in Australia?

Petbarn says most flea, tick and worming products do not require a prescription from a vet, and it sells NexGard Spectra and Simparica Trio online. Your vet is still the best person to check the right product and dose for your dog's weight and health.

Is Petbarn or Pet Circle cheaper for NexGard Spectra?

Neither is always cheaper. Petbarn offers member pricing for Friends for Life members, Repeat Delivery and a price guarantee, while Pet Circle offers free shipping on orders over $49 with exclusions and its own Auto-Delivery. Compare the same pack size and weight band on the same day, including delivery.

How does ShopBack lower the price of flea treatment?

ShopBack lowers the effective price of flights, hotels and online orders after you pay. Open ShopBack, tap the store, then check out in the same session, and part of what you spend comes back as cash. Each store's live rate and Terms are on its ShopBack page.

Can I use a promo code and ShopBack on the same flea treatment order?

It depends on the store. At the time of writing, the ShopBack Terms for Petstock and Pet Circle exclude purchases made with vouchers or promo codes not featured on ShopBack, and Petstock's Terms also exclude shelf price drop and everyday multibuy offers. Read the Terms on the store's ShopBack page before you apply any code.

How often do I need to give NexGard Spectra, Simparica Trio or Bravecto?

NexGard Spectra and Simparica Trio are given once a month, according to Petbarn. Bravecto's chew for dogs is given every three months and its spot-on for dogs every six months for flea and paralysis tick protection, according to Bravecto. Follow the pack directions and your vet's advice.

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Disclaimer

The views in this article are those of the author. This article is about buying, not veterinary advice; ask your vet about the right parasite product and dose for your dog. Product ranges, pack sizes, prices, member pricing, delivery fees and repeat order options vary by store and change often; check each store's site before you buy. Prices in the worked examples are illustrative. ShopBack rates and terms vary by store and over time; check the current rate and Terms on each store's ShopBack page before purchase.

This article is general information only and is not financial advice.