Cats | Health
Best Omega 3 Fish Oil for Cats in Australia: Ultimate Guide for 2026
Hot Aussie summers can do a number on a cat’s coat — dry flakes, dull fur, and that subtle “itchy but I won’t admit it” energy. That’s where a good omega boost really earns its keep. The right fish oil calms skin, softens fur, and brings back that glossy look without turning mealtime into a smelly mess. A quality multivitamin helps fill nutritional gaps and a probiotic supports digestion — but omega-3s are the go-to when skin, coat, and inflammation are the main concern. The RSPCA’s cat feeding guidance echoes this: cats are obligate carnivores whose dietary fats matter for skin and coat health. We’ve compared the salmon oils and 3-6-9 blends that are practical for everyday Aussie households — see our omega-3 for cats knowledge guide for the deeper detail.
Best Overall
Zesty Paws Omega Boost Salmon Oil
- High EPA/DHA concentration
- Nourishes skin and coat
- Not 100% salmon oil
Best Omega 3-6-9
Natural Animal Solutions Omega Oil
- Full omega 3-6-9 blend
- Includes olive oil and Vitamin E
- Pump can clog over time
Best Budget
Pets Purest Salmon Oil
- 99.5% pure salmon oil
- Large 1L bottle, great value
- Stronger fishy smell
Best Aussie-made
Wonderfur Super Omega Oil
- 99.95% pure Tasmanian salmon
- Balanced 3-6-9 omega profile
- Higher cost per mL
Omega oils all do the same headline job — supplying the EPA and DHA your cat can’t synthesise — but the differences in purity, concentration, and pump design separate a bottle you’ll actually use daily from one that sits in the fridge unopened by month three. Below: the five details that matter most when choosing, then a side-by-side comparison and our full notes on each pick.
What to look for in a cat omega oil
The five details that matter most. Scroll across to read all five.
Formula type
Skin and coat issues respond best to high-EPA salmon oils. Full 3-6-9 blends suit general wellness and households dosing multiple pets.
Ingredient list
Simple is better — ideally salmon or cod liver oil as the main source. A long ingredient list usually means filler oils diluting the active omegas.
Storage and freshness
These oils oxidise quickly in heat. Refrigerate after opening, check the expiry, and trust your nose — rancid fish oil belongs in the bin, not the bowl.
Dispenser type
Pumps suit daily dosing and stay tidier than droppers. Test the seal on arrival — a few brands ship with pumps that drip or clog over time.
Bottle size and cost
Smaller bottles look cheaper upfront but burn through fast on daily use. Per millilitre, the 1L formats often work out the better value over six months.
At a glance
Our top four picks compared — specs, prices, and our one-line take on each.
| Rank | Product | Best for | Key feature | Approx. price | Check price link |
|---|---|---|---|---|---|
| Best Overall |
|
Skin and coat priority, picky eaters | Triple-oil blend with 91% salmon base and no fishy smell. | ~$55-65 AUD (500mL) | Check price |
| Best Omega 3-6-9 |
|
Multi-pet households wanting balanced omegas | Full 3-6-9 spectrum at the most accessible price point. | ~$20-30 AUD (500mL) | Check price |
| Best Budget |
|
Long-term daily dosing | 99.5% pure salmon oil in a 1L pump bottle. | ~$55-65 AUD (1L) | Check price |
| Best Aussie-made |
|
Australian sourcing priority | 99.95% pure Tasmanian Atlantic salmon, lab-tested. | ~$35-40 AUD (250mL) | Check price |
Our picks in detail
What we love, what to watch out for, and who each pick really suits.
Best Overall: Zesty Paws Omega Boost Salmon Oil
Bottom line — the most palatable of the four, with a high-concentration triple-oil blend that suits skin, coat, and joints alike.
Zesty Paws Omega Boost combines French salmon, concentrated fish oil, and linseed into a triple-oil formula rich in EPA, DHA, and ALA. The 91% salmon oil base keeps fillers out, while a low-odour formulation makes it palatable even for picky eaters — useful for cats that turn their nose up at stronger salmon products. Added Vitamin E and olive oil help protect the fatty acids from oxidising through warmer Aussie months.
Dosing runs roughly 5ml per 10kg of body weight, so the 500ml bottle lasts several months for a small dog or a couple of cats. The pump is convenient but needs tightening firmly to avoid drips. Best suited to households where skin and coat are the priority and a fussy eater is in the mix; if pure salmon oil with the simplest possible ingredient list is what you’re after, Pets Purest or Wonderfur are the more focused options.
| What we love | Areas for improvement |
|---|---|
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Best Omega 3-6-9: Natural Animal Solutions Omega Oil
Bottom line — the cleanest 3-6-9 spectrum for households wanting an Aussie-made all-rounder rather than a salmon-only specialist.
Natural Animal Solutions Omega Oil blends cod liver, flaxseed, extra virgin olive, and sunflower oils to deliver the full omega 3-6-9 spectrum — EPA, DHA, linoleic acid, and oleic acid — plus Vitamin E for stability. Made in Australia from human-grade ingredients, it’s positioned as a general wellness supplement rather than a salmon-specific skin treatment.
Dosing is roughly 5ml per 10kg daily, so a 500ml bottle covers a 10kg pet for three to four months at the published rate. Expect glossier coats within four to six weeks of consistent use. The twist pump is the main weakness — it can clog over time and occasional bottles ship leaking, so it’s worth checking the seal on arrival. Best for households that want balanced omegas across multiple pets, including horses, at a lower price point than the salmon-only specialists.
| What we love | Areas for improvement |
|---|---|
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Best Budget: Pets Purest Salmon Oil
Bottom line — the simplest premium-purity salmon oil at the best price per millilitre, with a 1L pump bottle that lasts.
Pets Purest is 99.5% cold-pressed Scottish salmon oil with 0.5% natural tocopherols and no filler oils — just the salmon. That single-ingredient approach keeps the EPA and DHA levels high per dose and the dosing simple. The 1L pump bottle uses food-grade plastic that holds up to Australian summer heat reasonably well, though refrigeration is still the safer call once opened.
Dosing is one 5ml pump per 5kg of pet weight, so a 1L bottle delivers around 200 pumps — six months or more for a 10kg pet. The pump should be kept upright to prevent drips, and refrigeration after opening is essential in our climate. The 1L bottle is heavy and the salmon-oil smell is pronounced — fine if your cat is already a fish eater, less so for fussier eaters. Best for households committed to long-term daily dosing who want pure salmon oil at the lowest cost per millilitre.
| What we love | Areas for improvement |
|---|---|
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Best Aussie-made: Wonderfur Super Omega Oil
Bottom line — the cleanest Australian-made salmon oil on offer, with 99.95% Tasmanian purity that justifies the premium per millilitre.
Wonderfur Super Omega Oil uses 99.95% pure Tasmanian Atlantic salmon as its base, with balanced Omega 3, 6, and 9 from a single Australian-owned source. Lab tested for contaminants, the formula sits at the cleaner end of the salmon oil category and is positioned to suit Australia’s heat through its high antioxidant content. Tasmanian salmon is a meaningfully different starting point from imported product.
Dosing is one 2ml pump per 5kg daily, so a 250ml bottle delivers around 125 pumps — roughly six weeks for a 10kg pet. Repurchasing is more frequent than the larger formats, and the cost per millilitre is the highest in this lineup. Best suited to households prioritising Australian sourcing and the cleanest available salmon oil, who don’t mind paying a premium for a smaller format and the more frequent restocks that come with it.
| What we love | Areas for improvement |
|---|---|
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FAQ
Is fish oil safe for my cat or dog?
Yes, high-quality fish oil is generally safe for healthy pets and can be beneficial — used correctly. Choose a reputable brand made for pets, free of heavy metals and additives. Stick to recommended dosing and consult a vet if your pet has pancreatitis or allergies. Excess omega-3 can cause mild stomach upset, so start with the lowest dose and build up gradually. For most pets, the benefits for skin, coat and joints outweigh these minor risks.
What benefits do omega-3 supplements provide?
Omega-3 fish oil provides EPA and DHA, which reduce inflammation and support overall health. In cats and dogs that means healthier skin and a shinier coat, plus potential relief from arthritis or allergies. It also supports heart and brain function. Vets often recommend omega supplements for pets with dry skin or joint stiffness.
How much fish oil should I give my pet?
Dosing depends on your pet’s weight and the product’s strength. A common guideline is around 5mg of combined EPA+DHA per kg of body weight per day (roughly 0.1ml of oil per kg). Most labels suggest about 1 teaspoon (5ml) per 10kg. A 5kg cat typically needs 1 pump (2.5ml) of a concentrated fish oil. Always follow the manufacturer’s instructions and adjust under vet advice if needed.
Can fish oil help with arthritis or joint pain?
Yes — omega-3s have anti-inflammatory properties that can ease joint pain in ageing or arthritic pets. Omega-3 supplements are often included in special diets for pets with arthritis, alongside ingredients like glucosamine. Reduced stiffness and better mobility typically follow a few months of daily fish oil. It works best as part of a holistic plan that includes proper weight management and vet care.
How should I store fish oil supplements?
Fish oil is sensitive to light and heat. Store bottles in a cool, dark place — most brands recommend refrigeration after opening. This prevents the oils from oxidising and going rancid, which would reduce effectiveness and could upset your pet’s stomach. Always check the expiry date and use within the manufacturer’s recommended period (usually 1-2 months) once opened.
Final thoughts
Omega-3 fish oil can make a real difference to your cat’s coat, comfort, and overall health — but only if it fits your routine and your budget. I always look at how clean the ingredients are first, then how easy the bottle is to use day to day, because if it’s fiddly or messy, you just won’t stick with it (Luna has zero patience for complicated dinners). Stick with a well-made oil, store it properly in our warmer climate, and you’ll end up with a much happier cat — softer coat, less itching, and one less thing to worry about.