If there's one supplement that comes up again and again in conversations about pet health, it's Omega-3. But with so many options on the market - and some big differences between them - it's worth understanding exactly why it's so highly regarded, and why the source of those Omega-3s matters more than most pet owners realise.
Why Omega-3 is so beneficial for your dog or cat
Omega-3 fatty acids play a vital role in your pet's overall health. From reducing inflammation and supporting joint mobility, to promoting a lustrous coat, healthy skin, and sharp eyesight, the benefits are wide-ranging. Omega-3s also support heart health, brain function, and immune system strength - making them valuable for pets of all ages, from energetic puppies and kittens right through to senior companions who need a little extra care.
Pets with allergies, arthritis, dull coats, or chronic inflammation are among those who tend to see the most noticeable improvements.
Not all Omega-3s are created equal
Here's something that surprises many pet owners: the Omega-3 you choose makes a significant difference to how much benefit your pet actually receives.
Omega-3 fatty acids come in different forms. The two that matter most for health are EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) - and these are the forms the body can use directly and immediately.
Some Omega-3 supplements are derived from plant-based, terrestrial sources such as flaxseed, chia seeds, or hemp oil. While these do contain Omega-3, they provide it in a form called ALA (alpha-linolenic acid), which the body must convert into EPA and DHA before it can be used. In dogs, this conversion rate is very low - typically only 5–15% - and in cats it is even lower, with some research suggesting cats have an extremely limited ability to make this conversion at all. This means a large proportion of a plant-based Omega-3 supplement may pass through your pet with little meaningful benefit.
Why marine-based Omega-3 is the superior choice
Marine sources of Omega-3 - such as salmon oil and other fish oils - deliver EPA and DHA directly, in a form your pet's body can absorb and utilise straight away. There is no conversion step, no loss of potency, and no guesswork. What's on the label is what your pet's body receives.
Salmon oil in particular is an excellent source, providing a natural balance of EPA and DHA alongside fat-soluble vitamins. It's also highly palatable for most dogs and cats - which means no battles at feeding time.
The bottom line
If you want to give your pet the full benefit of Omega-3 supplementation, choose a high-quality, marine-based fish oil; one derived from plant sources - is unlikely to deliver the same results.
Your pet deserves the best. And when it comes to Omega-3, that means going straight to the source.