5 Best Fish Oil Supplements for Cats in 2023

5 Real Benefits Of Fish Oil For CatsIt is not uncommon for cats to lose hair, itchy skin and persistent joint pain as they age. The main cause of deteriorating health is usually low nutritional intake, which is why you must pay attention to your cat’s diet. Adding fats to a cat’s daily diet is more important than ever. In fact, fats provide cats with twice as much energy as protein and carbohydrates, making them a great source of a large number of nutrients. Fish oil is known for its numerous health benefits, and it’s not just humans who can benefit from it. Cats can also benefit from fish oil supplements, which provide essential omega-3 fatty acids that support their skin health, prevent heart disease and suppress inflammation.


Read on to learn about our selection of the best omega-3 fish oil supplements for cats.


1. Nordic Naturals Omega-3 Pet Soft Gels

Nordic Naturals is a well-respected brand in the supplement industry. Their Omega-3 Pet Soft Gels are specifically formulated for cats and are sourced from wild-caught fish. These soft gels contain high levels of EPA and DHA, promoting healthy skin, a shiny coat, and joint flexibility in felines.


What We Liked:

omega-3 fish oils are in the form of triglyceride molecules (the form naturally found in fish) for optimal absorption

Contains no artificial colors, flavors or preservatives

Each softgel contains 165 mg of EPA and 330 mg of DHA


What We Didn’t Like

Harder, more plastic gel capsules become more difficult to puncture.

2. Puainta Sardine Fish Oil for Dogs and Cats

Sold in a 20/ 90-count bottle and containing guaranteed levels of DHA and EPA. for cats between over 4.5 pounds, the recommended dose of one capsule per day contains 262 mg of EPA and 172 mg of DHA per serving.


These omega-3 capsules provide an easy-to-take alternative to liquid supplements, but you can also cut off the tip of the capsule and squeeze the liquid directly onto your cat’s food. These capsules are rich in omega-3s to 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

Added vitamin E and vitamin A (since fish oil supplementation can lead to lower vitamin E levels)


What We Didn’t Like:

Some cats may not accept capsules

3. Zesty Paws Pure Wild Alaskan Salmon Oil for Cats

Zesty Paws is one of the most trusted manufacturers of pet products, including supplements such as Wild Alaskan Salmon Oil for dogs and cats. The supplement is rich in omega-3 fatty acids, which support heart health, cognitive function and immune system strength in cats. It is also free of artificial flavors, preservatives and additives.


The supplement contains pure wild Alaskan salmon oil with 850 mg of omega-3 fatty acids per teaspoon (4.5 g). This liquid supplement is easy to add to your cat’s diet and he’ll love the authentic salmon flavor.


What we like:

Rich in essential omega-3 DHA and EPA

Liquid form is easy to administer

Supports joint, hip, heart and immune health

Made in the USA with wild Alaska salmon


What we don’t like.

Strong fishy taste

4. Grizzly Omega Health for Cats

Grizzly Omega Health is a well known brand known for their high quality fish oil products. Their cat-specific formula contains sustainably sourced wild Alaskan salmon oil that provides optimal levels of DHA and EPA. This supplement helps maintain healthy skin, a lustrous coat and overall immune system function.


What we like:

Large quantities for families with multiple fur kids

Wild-caught, sustainably harvested Alaska deep water only

Pump-loading design, easy to use


What we don’t like.

Some reviewers say the pump leaks

May make your cat breathe in smelly fish

5. Fera Pet Organics Fish Oil

Using sustainably sourced, wild-caught sardines, anchovies, herring, mackerel from Iceland, Fera Pet Organics Fish Oil is unmatched in its purity. With the highest amount of EPA and DHA compared to other leading brands, it’s no wonder this omega-3 supplement packs a punch. Fish oil supplementation may cause lowered levels of Vitamin E, so Fera Pet adds this natural antioxidant through distilled, non-GMO, and soy-free sunflowers.

What we like:

Added vitamin E (since fish oil supplementation can lead to lower vitamin E levels)

900 mg of EPA and 600 mg of DHA per teaspoon

Wild sardines, anchovies, herring, mackerel from Iceland


What we don’t like.

Dogs may not like the taste

Strong fishy smell

Some reviews say dogs get upset stomachs when eating it

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

EPA DHA Total Long Chain Omega-3
35 mg 21 mg 71mg
69 mg 41 mg 143 mg
104 mg 62 mg 214 mg
138 mg 83 mg 285 mg
173 mg 104 mg 356 mg


It’s important to use fish oil supplements formulated specifically for cats, as some human fish oil supplements may contain ingredients that can be harmful to cats. Additionally, the dosage should be carefully monitored to avoid giving your cat too much fish oil, which can lead to vitamin E deficiency or other potential health issues.


Q: What are the side effects of fish oil for cats?

A: Although fish oil is safe for cats, some felines may experience mild side effects such as diarrhoea, fatigue, skin flaking or vomiting. To be on the safe side, it is recommended that your cat starts with 1/4 of the recommended dose and then increases it to the full amount. Doing so will allow them to adapt better to the supplement and by starting with a small dose you will know if they should continue to take it.


Q: What type of omega-3 fish oil is best?

A: 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.

  • Jessica

    Jessica is a passionate pet lover and veterinarian with over 15 years of experience. Her blog serves as a reliable source for pet health advice, ranging from preventive care to handling emergencies.

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