Choosing the right NexGard Spectra pack for your dog should be straightforward — but between the colour-coded weight brackets, the 3-pack vs 6-pack question, and the price spread across Australian retailers, it’s easy to end up paying more than you need to. This guide explains the Australian NexGard Spectra range from top to bottom: what colours mean which weights, how 3-pack and 6-pack pricing compares, and which retailer in our catalog is cheapest for each size right now.
Quick Answers
- NexGard Spectra protects dogs against fleas, ticks, heartworm, roundworm, hookworm, and whipworm — all in one monthly chew.
- Colour codes: Orange (2–3.5kg) → Yellow (3.6–7.5kg) → Green (7.6–15kg) → Purple (15.1–30kg) → Red (30.1–60kg).
- VetSupply is consistently the cheapest retailer for NexGard Spectra dog products in our catalog.
- 6-packs save money long-term but the per-chew saving varies by weight class — see below.
Understanding the NexGard Spectra Colour Code System
Each NexGard Spectra pack is colour-coded by your dog’s body weight. This is important — the active ingredient concentrations differ between sizes, so using the wrong pack is either ineffective or unsafe. Here’s the full Australian colour system:
- Orange — Very Small Dogs, 2–3.5kg
- Yellow — Small Dogs, 3.6–7.5kg
- Green — Medium Dogs, 7.6–15kg
- Purple — Large Dogs, 15.1–30kg
- Red — Extra Large Dogs, 30.1–60kg
Always weigh your dog before buying. If your dog sits at the top of a weight bracket (say, 7kg), they may be approaching the next size up — worth checking with your vet before the next purchase.
NexGard Spectra vs NexGard: What’s the Difference?
NexGard (without “Spectra”) only covers fleas and ticks. NexGard Spectra adds broad-spectrum intestinal worming and heartworm prevention. For Australian dog owners — particularly in Queensland and other heartworm-prevalent regions — Spectra is the more complete option. The monthly chew format is the same; you’re just getting broader parasite coverage.
Prices by Weight Class: 3-Pack vs 6-Pack
The prices below are from our live catalog, representing the range across VetSupply, Jumbo Pets, and Chemist Direct at time of indexing.
Yellow — Small Dogs (3.6–7.5kg)
NexGard Spectra Yellow Small 3 Pack (3.6–7.5kg)
From $58.39 across 3 retailers — Compare Prices →
NexGard Spectra Yellow Small 6 Pack (3.6–7.5kg)
From $76.45 across 3 retailers — Compare Prices →
For the Yellow size, the 6-pack works out to approximately $12.74 per chew (VetSupply, lowest) compared to roughly $19.46 per chew for the 3-pack. That’s a substantial saving if you’re committed to monthly treatment. VetSupply is cheapest at $76.45 for the 6-pack — Chemist Direct prices this at $109.95, a gap of over $33.
Green — Medium Dogs (7.6–15kg)
NexGard Spectra Green Medium 3 Pack (7.6–15kg)
From $62.89 across 2 retailers — Compare Prices →
NexGard Spectra Green Medium 6 Pack (7.6–15kg)
From $85.89 across 3 retailers — Compare Prices →
Medium dogs (the most common bracket — this covers Beagles, Spaniels, Cattle Dogs, Corgis, and similar breeds) see strong price competition. VetSupply leads at $85.89 for the 6-pack vs $128.95 at Chemist Direct. If you have a medium breed, the VetSupply 6-pack is an easy way to save $43 on six months of protection.
Purple — Large Dogs (15.1–30kg)
NexGard Spectra Purple Large 3 Pack (15.1–30kg)
From $67.45 across 3 retailers — Compare Prices →
NexGard Spectra Purple Large 6 Pack (15.1–30kg)
From $90.89 across 3 retailers — Compare Prices →
Larger breeds like Labradors, Boxers, and Border Collies fall here. At the lowest prices, the 6-pack works out to $15.15 per chew vs $22.48 per chew for the 3-pack — a saving of over $40 across six months when buying from VetSupply rather than Chemist Direct.
Red — Extra Large Dogs (30.1–60kg)
NexGard Spectra Red Extra Large 6 Pack (30.1–60kg)
From $95.89 across 3 retailers — Compare Prices →
For very large breeds — Rottweilers, German Shepherds, Golden Retrievers on the larger end — the Red pack keeps the price reasonable. VetSupply ($95.89 for 6-pack) vs Chemist Direct ($138.95) represents a $43 difference. Worth making a conscious choice here rather than defaulting to wherever you happen to order from.
Orange — Very Small Dogs (2–3.5kg)
The Orange pack for tiny dogs and puppies under 3.5kg is primarily stocked by VetSupply in our current catalog. The 3-pack is $51.19 and the 6-pack is $71.89. If you have a small breed like a Chihuahua or Maltese under 3.5kg, confirm the weight bracket carefully — very small dogs close to the 3.5kg limit may need the Yellow pack at their next weigh-in.
Should You Buy 3-Pack or 6-Pack?
Across every weight class, the 6-pack works out cheaper per chew. The question is whether you’re confident your dog will stay in the same weight bracket for six months. For adult dogs at a stable weight, the 6-pack is the smarter buy. For puppies still growing or dogs on a weight management programme, stick to the 3-pack until their weight stabilises.
Where to Buy NexGard Spectra Cheapest
Based on our current catalog data across VetSupply, Jumbo Pets, and Chemist Direct, VetSupply is the lowest-priced retailer for NexGard Spectra in every weight class. The savings are most significant on 6-packs — up to $43 cheaper than the highest-priced retailer in our catalog for some sizes.
That said, prices change. Browse our dog supplies category and check live prices before you buy — a single tab is all it takes to confirm you’re getting the best deal.
If your dog is a Corgi or similar medium breed prone to joint issues, our corgi dog food guide pairs well with a parasite prevention routine — joint-supportive food combined with monthly NexGard Spectra covers the two most common health concerns for the breed.