Best Omega 3 Fish Oil For Cats

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Fish oil is a rich source of omega-3 fatty acids which are essential for cats. Typically found in coldwater fish like tuna, trout, and salmon, fish oil contains two types of fatty acids: eicosapentaenoic (EPA) and docosahexaenoic (DHA).

Omega-3 fatty acids are an important component of cell membranes and they help provide energy for the body. Fish oil supplements support these essential functions but may also boost your cat’s immune system and promote healthy skin and coat.

Read on to see our top picks for the best omega-3 fish oil supplements for cats.

At A Glance: Our Top Picks For Best Omega-3 Fish Oil For Cats

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We highly recommend looking at the comparison table we have below where we highlighted the features of each product. You’ll also find more detailed information about each product later in the article.

#1
10.0
Picked by 31 people today!

Zesty Paws Pure Wild Alaskan Salmon Oil for Dogs & Cats

  • Made from wild-caught Alaskan salmon oil
  • Packed with EPA and DHA
  • Easy to administer liquid form
#2
9.8
Picked by 31 people today!

TerraMax Premium Omega-3 Fish Oil for Dogs & Cats

  • Guaranteed levels of EPA and DHA
  • Made from premium sardines, herring, anchovies, and mackerel
  • Completely free from mercury and heavy metals
#3
9.8
Picked by 25 people today!

Nordic Naturals Omega-3 Pet Liquid Supplement

  • Easy to dose with included eyedropper
  • Supports healthy skin and coat
  • Derived exclusively from wild anchovies and sardines
#4
9.7
Picked by 21 people today!

Vital Pet Life Wild Alaskan Salmon Oil

  • Choose from three different sizes
  • Made with wild-caught Alaskan salmon oil
  • Easy to dose with pump applicator
#5
9.6
Picked by 18 people today!

Finest for Pets Omegaease Omega-Rich Fish Oil Dog & Cat Supplement

  • Rich in DHA and EPA
  • Fish oil from anchovies, sardines, herring, and mackerel
  • Available in three sizes with pump applicator
#6
9.5
Picked by 31 people today!

Iceland Pure Pet Products Unscented Pharmaceutical Grade Salmon Oil

  • Made from Norwegian salmon oil
  • Ultra-filtered to reduce fishy odor
  • Sold in an eco-friendly aluminum bottle
#7
9.5
Picked by 31 people today!

Deley Naturals Wild Caught Fish Oil for Cats

  • Packed with omega-3 and omega-6s
  • Derived from anchovy, mackerel, sardine, and herring
  • Backed by a 100% satisfaction guarantee
#8
9.4
Picked by 25 people today!

American Journey Wild Alaskan Salmon Oil Formula Liquid Supplement

  • Made in the USA with natural ingredients
  • Rich in essential omega 3s like DHA and EPA
  • Convenient squeeze bottle and drip-free cap
#9
9.4
Picked by 21 people today!

21st Century Essential Pet Alaska Wild Salmon Oil Soft Chews

  • Wild Alaskan salmon oil is the main ingredient
  • Contains 20mg EPA and 25mg DHA per bite
  • Soft, bite-sized chews are easy to administer
#10
9.3
Picked by 18 people today!

Free Form Snip Tips Fatty Acid Capsules for Small Dogs & Cats

  • Guaranteed levels of DHA and EPA
  • Snip the tip off the administer as a liquid
  • Support skin, eye, joint, brain, heart, and kidney health

Our Top Picks For The Best Omega 3 Fish Oil For Cats

Now that you have a better understanding of how we came to our top picks, you’re probably eager to see them!

Here are our top 10 picks for best fish oil supplements for cats:

#1 Zesty Paws Pure Wild Alaskan Salmon Oil For Dogs & Cats

Zesty Paws is one of the most trusted manufacturers of pet products including supplements like this wild Alaskan salmon oil for dogs and cats. Packed with EPA and DHA, this supplement is designed to support hip, joint, heart, and immune function.

This supplement contains pure wild Alaskan salmon oil with 850 mg of omega-3 fatty acids per teaspoon (4.5g). In its liquid form, this supplement is easy to add to your cat’s food and he’s sure to love the authentic salmon flavor.

What We Liked:

  • Packed with essential omega-3s DHA and EPA
  • Easy to administer liquid form
  • Supports joint, hip, heart, and immune health
  • Made in the USA with wild-caught Alaskan salmon

What We Didn’t Like

  • Strong fish odor

#2 TerraMax Premium Omega-3 Fish Oil For Dogs and Cats

TerraMax Pro Premium Omega-3 Fish Oil Dog Supplement
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Packed with omega-3 fatty acids from sardine, herring, anchovy, and mackerel, this liquid fish oil supplement is extremely potent. It is a pharmaceutical grade formula guaranteed to contain at least 800mg EPA and 525 DHA per serving.

This fish oil supplement is molecularly distilled for purity and potency, certified mercury-free with no detectable levels of PCBs, heavy metals, or pesticides. It is completely safe and natural, derived from wild-caught fish caught exclusively in the waters of Iceland with sustainable fishing methods.

What We Liked

  • Guaranteed levels of EPA and DHA
  • 100% safe and natural ingredients
  • Contains premium sardines, herring, anchovy, and mackerel
  • Free from mercury, heavy metals, and pesticides

What We Didn’t Like

  • Pump may not work well
  • Some complaints of leaky bottles

#3 Nordic Naturals Omega 3 Pet Liquid Supplement For Cats

Nordic Naturals Omega-3 Pet Cats & Small Breed Dog & Cat Supplement

Derived exclusively from wild anchovies and sardines, this highly concentrated fish oil is distilled for purity and tested by third-party labs for safety. With guaranteed levels of DHA and EPA, this supplement supports your cat’s skin, coat, joints, and heart.

This Nordic Natural omega-3 supplement is packaged in a durable glass bottle which preserves the quality of the product. It comes with a handy dropper for easy dosage as well – simply measure out the desired dose and drop it directly onto your cat’s food.

What We Liked:

  • Easy to use, the marked eyedropper for accurate dosing
  • Derived exclusively from wild anchovies and sardines
  • Supports healthy skin and coat in cats
  • Completely free from artificial colors or flavors

What We Didn’t Like

  • Has a strong fish odor
  • Bottle only contains 2 fluid ounces

#4 Vital Pet Life Wild Alaskan Salmon Oil For Cats

What We Liked:

  • High tech yet quite easy to use.
  • Helps Inflammation, joint problems, & Arthritis
  • Great for shiny coat

What We Didn’t Like

  •  Small quantity for the price

#5 Finest For Pets Omegease Omega-Rich Fish Oil Dog & Cat Supplement

Packaged in a sturdy bottle with a handy pump applicator, this fish oil supplement is derived from wild-caught sardines, anchovies, herring, and mackerel. All the fish used for this supplement are sustainably caught from the clear waters of the North Atlantic.

Loaded with DHA and EPA, this omega-3 fish oil supplement mixes easily with your cat’s food and adds irresistible flavor. It soothes dry, itchy skin and reduces inflammation associated with allergies and joint problems. The DHA content may also support heart and brain function.

What We Liked:

  • Available in three sizes with pump applicator
  • Made with fish oil from wild, sustainably caught fish
  • Rich in DHA and EPA
  • Fish oil from anchovies, sardines, herring, and mackerel

What We Didn’t Like

  • Some cats don’t like the flavor
  • Smaller sizes are more expensive per ounce

#6 Iceland Pure Pet Products Unscented Pharmaceutical Grade Salmon Oil

Iceland Pure Pet Products Unscented Pharmaceutical Grade Salmon Oil Liquid Dog & Cat Supplement

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Made with a single natural ingredient – pure Norwegian salmon oil – this supplement is packed with essential omega-3 and omega-6 fatty acids. Choose from three different sizes, all sold in an eco-friendly, non-toxic brushed aluminum bottle with a convenient pump.

This salmon oil supplement is loaded with EPA and DHA to support your cat’s healthy skin and coat as well as limber joints. The formula is ultra-filtered to remove the fishy odor but still retains the natural fish flavor cats love.

What We Liked:

  • Ultra-filtered to reduce the fishy odor
  • Rich in omega-3 fatty acids EPA and DHA
  • Made a single natural ingredient, Norwegian salmon oil
  • Eco-friendly, non-toxic brushed aluminum bottle

What We Didn’t Like

  • Some complaints about the pump
  • Some cats may not like the unscented formula

#7 Deley Naturals Wild Caught, GMO-Free Omega 3 Fish Oil For Cats

Made with 100% pure fish oil and no added ingredients, this omega-3 supplement helps eliminate itchy skin, excessive shedding, and painful joints. The GMO-formula also supports your cat’s immune health and cardiovascular function.

Packed with high levels of omega-3 and omega-6 fatty acids, this liquid supplement is derived from anchovy, mackerel, sardine, and herring fished from the pristine North Atlantic. It comes in a 16-ounce bottle with a pump top and is backed by a 100% satisfaction guarantee.

What We Liked:

  • Helps reduce itching and excessive shedding
  • Packed with omega-3 and omega-6s
  • Derived from anchovy, mackerel, sardine, and herring
  • Backed by a 100% satisfaction guarantee

What We Didn’t Like

  • Not for cats with sensitive stomachs

#8 American Journey Wild Alaskan Salmon Oil Formula Liquid Supplement

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Affordably priced and sold in two sizes, this wild Alaskan salmon oil liquid supplement is completely free from artificial colors, flavors, and preservatives. It is proudly made in the USA with all-natural ingredients including wild Alaskan salmon and pollock, making it a rich source of essential fatty acids like DHA and EPA.

This American Journey fish oil supplement contains a 51/49% blend of salmon and pollock oils, crafted to support your cat’s skin and coat health. It comes with a convenient squeeze bottle design and a drip-free cap for easy administration.

What We Liked:

  • Made in the USA with natural ingredients
  • Rich in essential omega 3s like DHA and EPA
  • Convenient squeeze bottle and drip-free cap
  • Rich fish flavor cats love

What We Didn’t Like:

  • Squeeze design can be tricky for dosing
  • Very strong fish odor

#9 21st Century Essential Pet Alaska Wild Salmon Oil Soft Chews

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If you can’t be bothered with dosing liquid supplements, these soft chews could be a great option for your cat. Packed with omega-3 fatty acids from wild Alaskan salmon, each soft chew contains 20mg of EPA and 25 mg of DHA.

In addition to plenty of wild Alaskan salmon oil, these veterinarian-approved soft chews contain other tasty ingredients like cheese and liver. The soft texture is easy for your cat to chew and each bite is packed with human-grade ingredients.

What We Liked:

  • Wild Alaskan salmon oil is the main ingredient
  • Contains 20mg EPA and 25mg DHA per bite
  • Soft, bite-sized chews are easy to administer

What We Didn’t Like:

  • Contains some unspecified ingredients like liver meal
  • Contains brewer’s dried yeast, by-product of the beer industry

#10 Free Form Snip Tips Fatty Acid Capsules For Small Dogs & Cats

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Sold in a 60-count bottle, these fatty acid supplements contain guaranteed levels of DHA and EPA. With a recommended dosage of one capsule per day for cats 5 to 14 pounds, each serving contains 262 mg of EPA and 172 mg of DHA.

These omega-3 capsules offer an easy-dosing alternative to liquid supplements, though you can also snip the tip off the capsule and squeeze the liquid directly onto your cat’s food. Packed with omega-3s, these capsules support your cat’s skin, eye, joint, brain, heart, and kidney health.

What We Liked:

  • Guaranteed levels of DHA and EPA
  • Snip the tip off the administer as a liquid
  • Support skin, eye, joint, brain, heart, and kidney health

What We Didn’t Like:

  • Fish oil source isn’t specified
  • Some cats may not accept capsules

Why Should You Give Your Cat Fish Oil Supplements?

Just like humans, cats require a balanced diet for optimal health, and that includes adequate intake of essential fatty acids.

An essential fatty acid is simply one your cat’s body can’t synthesize on its own. The essential fatty acids cats need are omega-3 and omega-6 fatty acids, both of which can come from dietary sources or nutritional supplements. Alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) are omega-3 fatty acids while linoleic acid (LA) and arachidonic acid (AA) are omega-6s.

Omega 3 fatty acids support the body’s natural anti-inflammatory response while also supporting skin and coat health. With their anti-inflammatory benefits, omega-3s can be helpful for cats with joint disease, arthritis, heart disease, kidney disease, and more.

The main source for these fatty acids is cold-water fish like salmon, tuna, sardines, bakala and anchovies, but an omega-3 supplement is a great way to increase your cat’s dietary intake of omega-3 fatty acids.

What Are The Benefits?

If you’re looking for a simple way to address an omega-3 deficiency – or you simply want to support your cat’s health in other areas – a fish oil supplement could be a good choice. Here are some of the benefits:

  • Vets recommend it – Recent studies indicate that fish oil is effective in treating allergic skin disease in pets as well as certain types of cancer. The VCA also recommends it for inflammatory diseases like arthritis, kidney disease, heart disease, inflammatory bowel disease, and diabetes.
  • Has anti-inflammatory properties – Omega-3 fatty acids support the body’s natural anti-inflammatory response and can be beneficial for a variety of inflammatory diseases.  Supports brain health – DHA plays a key role in eye and brain development in kittens, so supplementing fish oil in pregnant or nursing cats may support healthy development in kittens. It also supports continued cognitive function in adult cats.
  • Helps reduce shedding – Adequate intake of essential fatty acids promotes a shiny, healthy coat, and reduces shedding. Controlling your cat’s shedding may have the added benefit of reducing issues with hairballs.
  • Relieves itching – Omega 3 fatty acids promote healthy skin and coat and have been known to reduce the symptoms of skin  allergies in cats. They can also help with dry skin and other causes for itching and scratching.

The benefits of fish oil supplements are tied to their quality. When shopping for omega-3 supplements for cats, look for pure, high-quality fish oil from a reputable company.

Avoid fish oil that comes from cod liver because it often contains vitamin A which, in high levels, can be toxic for cats. Be sure to check the best by date as well because fish oil is highly sensitive to oxidation and you don’t want to give your cat a product that has gone bad.

How Much Fish Oil To Give A Cat Daily?

There is no exact recommended dosage for fish oil because your cat’s needs may vary depending on his diet and concurrent medical conditions. Dosing fish oil can be tricky as well because different formulas contain different concentrations of EPA and DHA.

There are several ways to determine dosage for fish oil:

  • Milligrams EPA + DHA per kilogram of body weight
  • Grams per 100g of pet food (as fed or dry matter basis)
  • Grams per 100 or 1,000 kcal of pet food
  • Ratio of omega-6 to omega-3

Catherine E. Lenox, DVM, and the American College of Veterinary Nutrition (ACVN) offer general dosing recommendations of 30 to 50 mg of fish oil per kilogram of body weight.

PetCareRX offers the following dosage recommendations:

Daily Dosage For Cats Over 2 Pounds
EPADHATotal Long Chain Omega-3
35 mg21 mg71mg
69 mg41 mg143 mg
104 mg62 mg214 mg
138 mg83 mg285 mg
173 mg104 mg356 mg

While fish oil is generally safe for cats, you should be aware of the potential for side effects. In large doses, fish oil can cause gastrointestinal upset in cats so be sure to start with a low dose and work your way up. It can also slow blood clotting, so talk to your vet if your cat is taking blood-thinning medications.

Frequently Asked Questions

Can I give my cat human fish oil supplements?

No, it is generally not recommended that you give your cat fish oil supplements intended for humans. These often contain flavorings and other additives like xylitol (a type of sweetener) which could be harmful or toxic to cats.

What type of omega-3 fish oil is best?

Fish oil supplements typically come in capsule or liquid form, though you may find them in soft chews as well. Look for a natural omega-3 supplement made with fish oil in its triglyceride form - the form your cat would naturally consume in pet food. Fish oil supplements made with synthetic oil (known as ethyl ester) contain high concentrations of EPA and DHA but they are more difficult for your cat’s body to absorb.

How much fish oil can I give my cat?

There is no known optimal dose of fish oil for cats and your cat’s required dose varies depending on what you’re trying to treat. The recommended intake is 2.5 mg per kg of body weight or about ½ teaspoon of pure omega fish oil per day.

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