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10 Best Fish Oil Supplements for Cats in 2024 – Reviews & Top Picks

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By Nicole Cosgrove

Vet approved

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Reviewed & Fact-Checked By

Dr. Paola Cuevas

MVZ (Veterinarian)

The information is current and up-to-date in accordance with the latest veterinarian research.

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curious cat and fish oil

Whether your cat is dealing with a less-than-shiny coat or something a little more serious, a fish oil supplement might just be what your cat needs to get things back on track. But with so many choices out there, it can be a challenge to find the right one.

The last thing that you want to do is go through product after product until you try one that works for your cat. That’s why we took the time to track down and develop reviews of 10 of the best fish oil supplements out there.

We also created a comprehensive buyer’s guide to walk you through everything that you need to know to get the right supplement for your cat!

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A Quick Look at Our Favorites in 2024

Rating Image Product Details
Best Overall
Winner
Nordic Naturals Omega-3 Pet Liquid Supplement Nordic Naturals Omega-3 Pet Liquid Supplement
  • Plenty of omega-3s
  • Effective
  • Lasts a long time
  • Best Value
    Second place
    PetHonesty Omega-3 Fish Oil PetHonesty Omega-3 Fish Oil
  • High omega-3 amounts
  • Affordably priced
  • 100% wild-caught fish
  • Premium Choice
    Third place
    Zesty Paws Core Elements Wild Alaskan Salmon Oil Zesty Paws Core Elements Wild Alaskan Salmon Oil
  • Easy to administer
  • Tons of omega-3s
  • One-ingredient formula (salmon oil)
  • Fera Pet Organics Fish Oil + Vitamin E Dog & Cat Supplement Fera Pet Organics Fish Oil + Vitamin E Dog & Cat Supplement
  • Made with sustainably sourced fish
  • No strong odor
  • Easy to follow feeding guidelines
  • Animal Essentials Ocean Supreme Fish Oil Animal Essentials Ocean Supreme Fish Oil
  • Made from EU-certified raw fish
  • Tons of omega-3s
  • Added vitamin E
  • The 10 Best Fish Oil Supplements for Cats

    1. Nordic Naturals Omega-3 Pet Liquid Supplement — Best Overall

    Nordic Naturals Omega-3 Pet Liquid Supplement for Cats & Small Dogs

    Check Price on Chewy
    Application Method: Oral dropper
    Size: 2 ounces
    Life Stage: Kitten, adult, and senior
    Omega-3 DHA Amount: 93 mg/mL
    Omega-3 EPA Amount: 156 mg/mL

    When you’re looking for the best overall fish oil supplement for cats, look no further than the Nordic Natural Omega-3 Pet Liquid Supplement. It uses a concentrated formula that enables you to get precise measurements for your cat, and it’s also extremely affordable and effective.

    Since you only need to use a bit a time, it lasts quite a while, even though it only comes in a 2-ounce bottle. There are plenty of omega-3s in this fish oil supplement, but keep in mind that it’s not always the easiest to give to your cat.

    While you can mix it with their water or food, applying it directly to their mouth is the most effective and preferred method.

    Pros
    • Affordably priced
    • Plenty of omega-3s
    • Effective
    • Lasts a long time

    Cons
    • Not the easiest to apply


    2. PetHonesty Omega-3 Fish Oil— Best Value

    PetHonesty Omega-3 Fish Oil Immune, Joint and Skin & Coat Supplement for Dogs & Cats

    Application Method: Food additive
    Size: 16 or 32 ounces
    Life Stage: Kitten, adult, and senior
    Omega-3 DHA Amount: 525 mg/tsp
    Omega-3 EPA Amount: 800 mg/tsp

    Among everything that PetHonesty Omega-3 Fish Oil offers, it also provides a high omega-3 content and is extremely affordable.

    PetHonesty only uses wild-caught fish in its formula, and it bottles everything at an FDA-certified facility. While all that is great for your cat, one of the best things about PetHonesty is that a portion of its profits goes to support no-kill animal shelters!

    So, not only are you helping keep your cat healthy, but you’re also supporting other cats and helping them find loving homes.

    However, this fish oil supplement does use a multi-fish formula. While this doesn’t matter for most cats, if your cat has a sensitive stomach or deals with allergies, it could turn into a problem.

    Pros
    • High omega-3 amounts
    • Affordably priced
    • 100% wild-caught fish
    • Bottled at FDA-certified facility
    • A portion of profits go to a no-kill shelter

    Cons
    • Not a single-fish-source formula

     


    3. Zesty Paws Core Elements Wild Alaskan Salmon Oil — Premium Choice

    Zesty Paws Core Elements Wild Alaskan Salmon Oil Liquid Skin & Coat Supplement for Cats & Dogs

    Application Method: Food additive
    Size: 8, 16, or 32 ounces
    Life Stage: Kitten, adult, and senior
    Omega-3 DHA Amount: 340 mg
    Omega-3 EPA Amount: 425 mg

    Zesty Paws Core Elements Wild Alaskan Salmon Oil is a phenomenal fish oil supplement that you can give your cat. While it’s expensive, when you consider how easy it is to apply and the amount of omega-3s that it offers your cat, it’s not a bad deal.

    If you find that your cat does like Zesty Paws Core Elements Wild Alaskan Salmon Oil and it’s working out for them, the company offers it in bulk sizes that can help drive down the cost.

    Finally, since it uses a simple single-ingredient formula, you know exactly what you’re getting, and the chance of your cat reacting to it is minimal at best.

    Pros
    • Easy to administer
    • Tons of omega-3s
    • Multiple size options
    • One-ingredient formula (salmon oil)

    Cons
    • Expensive

     


    4. Fera Pet Organics Fish Oil + Vitamin E Dog & Cat Supplement

    Fera Pet Organics Fish Oil + Vitamin E Dog & Cat Supplement

    Application Method: Food additive
    Size: 8 or 16 ounces
    Life Stage: Adult, senior
    Omega-3 DHA Amount: 600 mg/tsp
    Omega-3 EPA Amount: 900 mg/tsp

    The Fera Pet Organics Fish Oil + Vitamin E Dog & Cat Supplement is a sustainably sourced option made with wild-caught fish such as sardines, anchovies, and herring. It contains a high amount of both EPA and DHA to support your cat’s skin and coat health. The formula has less of a strong or offensive odor compared to other options on the market, which may make it easier to mix into your pet’s food without them knowing about it. This oil is easy to pump and mix into your cat’s meal.

    However, because it is not a single-fish formula, this product may cause issues for cats with sensitive tummies. Also, the pump’s quality could be upgraded to avoid leaks.

    Pros
    • Made with sustainably sourced fish
    • Contains a high amount of EPA and DHA
    • No strong odor
    • Easy to follow feeding guidelines

    Cons
    • Not a single-fish formula
    • Pump might leak


    5. Animal Essentials Ocean Supreme Fish Oil

    Animal Essentials Ocean Supreme Fish Oil Dog & Cat Supplement

    Application Method: Food additive
    Size: 8 or 16 ounces
    Life Stage: Kitten, adult, and senior
    Omega-3 DHA Amount: 470 mg/tsp
    Omega-3 EPA Amount: 750 mg/tsp

    The Animal Essentials Ocean Supreme Fish Oil is a fish oil supplement that comes jam-packed with omega-3s and vitamin E. These nutrients combine to give your cat plenty of skin and coat benefits, and it’s a big reason that you want to give your cat a fish oil supplement in the first place.

    Not only does Animal Essentials Ocean Supreme Fish Oil provide tons of health benefits, but it only has EU-certified raw fish in its formula, and the PET plastic bottle is 100% recyclable.

    However, it’s not a single-fish formula and it’s expensive. But as long as you can afford the slightly higher price tag and your cat doesn’t have a sensitive stomach, it can be an outstanding choice.

    Pros
    • Two size options
    • Tons of omega-3s
    • PET plastic bottle is recyclable
    • Made from EU-certified raw fish
    • Added vitamin E

    Cons
    • Expensive
    • Not a single-fish-source formula


    6. PetHonesty Wild Alaskan Salmon Oil

    PetHonesty Wild Alaskan Salmon Oil Liquid Supplement for Dogs & Cats

    Application Method: Food additive
    Size: 16 or 32 ounces
    Life Stage: Kitten, adult, and senior
    Omega-3 DHA Amount: 465 mg/tsp
    Omega-3 EPA Amount: 423 mg/tsp

    PetHonesty’s Wild Alaskan Salmon Oil has fewer omega-3s compared to its other fish oil product, but this also uses a single-fish formula.

    It only uses sustainably caught Alaskan salmon, and there are tons of nutrients that can help keep your cat healthy.

    While it is expensive, it does last a long time. Even better, there are multiple size options to choose from, so you can help cut down the costs by buying in bulk.

    Finally, a portion of PetHonesty’s profits goes toward no-kill animal shelters. This means you’re not only getting your cat the nutrients that they need to thrive, but you’re also supporting other animals in need!

    Pros
    • Tons of omega-3s
    • Two size options
    • Lasts a long time
    • Uses sustainably caught Alaskan salmon
    • Some of PetHonesty’s profits go to no-kill animal shelters
    • Provides tons of nutrients

    Cons
    • Expensive
    • Not all cats like the taste


    7. Plato Wild Alaskan Salmon Oil

    Plato Wild Alaskan Salmon Oil Dog & Cat Supplement

    Application Method: Food additive
    Size: 8, 15.5, or 32 ounces
    Life Stage: Adults
    Omega-3 DHA Amount: 482 mg/tsp
    Omega-3 EPA Amount: 402 mg/tsp

    If you’re looking for a fish oil supplement that comes in a ton of different sizes for you to choose from, the Plato Wild Alaskan Salmon Oil is an outstanding choice. It comes in three different sizes, all of which are realistic options for your cat.

    Each serving contains more than enough omega-3s to give your cat’s skin and coat a boost, and it has vitamin E for added antioxidants.

    However, Plato Wild Alaskan Salmon Oil is not the easiest to measure out. It also has lower omega-3 amounts than many other supplements.

    Pros
    • Affordable
    • Decent omega-3 amounts
    • Includes vitamin E supplements
    • Tons of health benefits

    Cons
    • Not the easiest to measure out


    8. Vetoquinol Flexadin Advanced with UCII Soft Chews

    Vetoquinol Flexadin Advanced with UCII Soft Chews Joint Supplement for Dogs & Cats

    Application Method: Chewable
    Size: 30- or 60-count treats
    Life Stage: Kitten, adult, and senior
    Omega-3 Amount: 100 mg per treat

    When you’re looking for the easiest way to get your cat a fish oil supplement and you don’t care how much it costs, consider Vetoquinol Flexadin Advanced With UCII Soft Chews.

    While they’re undoubtedly expensive and don’t include that many chews, when you consider how easy they are to administer and how many nutrients are in each treat, they’re an outstanding deal.

    There are tons of omega-3s in each treat, and they also have plenty of vitamin E and UCII (a branded chicken collagen). This combination supports a cat’s coat, skin, and joint health, making it one of the best supplements that you can give your cat. While you might have to spend a little more on it, it’s also the best of the best.

    Pros
    • Two size options
    • Easy to administer
    • Provides omega-3s, vitamin E, and UCII
    • Provides outstanding joint support

    Cons
    • Expensive
    • Not just a fish oil supplement


    9. Nutramax Cosequin Soft Chews Joint Supplement

    Nutramax Cosequin Soft Chews Joint Supplement for Cats

    Application Method: Chewable
    Size: 60 count
    Life Stage: Kitten, adult, and senior
    Omega-3 DHA Amount: 10 mg per chew
    Omega-3 EPA Amount: 15 mg per chew

    The Nutramax Cosequin Soft Chews Joint Supplement is an extremely affordable treat-style fish oil supplement, making it easy to administer as long as your cat likes the taste.

    Even better, since each cat typically only needs one or two treats a day, a single bag should last you quite a while. Moreover, it contains glucosamine and chondroitin to can help promote healthy joints in addition to the usual skin and coat benefits of fish oil.

    However, this fish oil supplement doesn’t have high amounts of omega-3. While it’s better than nothing, it’s a fraction of the amount of what most other supplements offer.

    Pros
    • Affordable
    • Easy to administer
    • Lasts a long time
    • Promotes healthy joints

    Cons
    • Lower omega-3 amount
    • Not all cats like the taste

     


    10. 21st Century Essential Pet Alaska Wild Salmon Oil Chews

    21st Century Essential Pet Alaska Wild Salmon Oil Skin & Coat Support Soft Chews Cat Supplement

    Application Method: Chewable
    Size: 100 count treats
    Life Stage: Kitten, adult, and senior
    Omega-3 DHA Amount: 20 mg
    Omega-3 EPA Amount: 25 mg

    Just because you want your cat to get all the health benefits that come with using a fish oil supplement, that doesn’t mean you want to spend a ton of money doing it. That’s where a product like 21st Century Essential Pet Alaska Wild Salmon Oil Chews comes in.

    These chews are a choice of fish oil supplement for cats for the money due to their extremely affordable price and longevity. A single pack comes with 100 treats, and most cats only need one or two a day! These treats are FDA registered and compliant, so you know exactly what you’re giving your cat each day.

    However, while these treats are a great value, they’re still a budget treat. Therefore, they don’t have the highest omega-3 amounts, and not all cats like the way they taste. Still, for the amount that you’re spending, you’ll be hard-pressed to find a better option.

    Pros
    • Affordable
    • Easy to administer
    • Lasts a long time
    • FDA registered and compliant

    Cons
    • Not all cats like the taste
    • Not the highest omega-3 amounts
    • Contains corn starch and other ingredients

    hepper single cat paw divider

    Buyer’s Guide: How to Choose the Best Fish Oil Supplements for Cats

    With so many great choices out there, it can be a challenge to determine which fish oil supplement is the best choice for your cat. We developed this comprehensive buyer’s guide to walk you through everything that you need to know to get the perfect fish oil supplement for your cat!

    Why Use a Fish Oil Supplement?

    While there are a few chronic issues that vets will prescribe fish oil to help alleviate, the truth is that there are plenty of health benefits of giving fish oil to a healthy cat. Here, we highlighted five of the most common health benefits associated with fish oil and cats!

    How Much Omega-3 Does Your Cat Need?

    It depends on what you’re looking to accomplish, but unless your cat has a sensitive stomach or is prone to excessive bleeding, most vets recommend 180 mg of EPA and 113 mg DHA per 10 pounds of body weight.

    However, since excessive amounts of omega-3s over a prolonged period can lead to blood-thinning or upsetting your cat’s stomach, we highly recommend seeking out advice from your cat’s veterinarian before starting your cat on a prolonged fish oil supplement schedule.

    Omega-3 DHA vs Omega-3 EPA

    While both DHA and EPA Omega-3s are marine omega-3s, they serve distinct functions for your cat. The EPA Omega-3s help reduce inflammation, and the DHA Omega-3s help boost their brain health.

    Since both functions are essential for different aspects of your cat’s health, it’s beneficial to get a fish oil supplement that has plenty of both types of omega-3s.

    Fish Oil Supplements Administration Methods

    When you’re selecting a fish oil supplement for your cat, there are three different administration methods that you need to consider. Here are three of the most common that you can pick from!

    Oral Dropper

    Oral droppers are probably the most effective choice that you have, but since fish oil is a concentrated formula, getting precise dosages can be a bit tricky. Many cats will also make applying it directly to their mouth a bit of a challenge, which means you’ll have to mix it with their food or water.

    Still, oral dropper-style fish oil supplements give you the most versatility when it comes to dosage amounts, and it often contains just the fish oil and nothing else!

    cat sniffing fish oil
    Image Credit: Larisa Lomaeva, Shutterstock

    Food Additive

    This is the most common type of fish oil supplement out there. With food additive supplements, all you do is pump a few squirts of the supplement onto their food and let them do the rest!

    Most cats love the taste of the additive, which means you likely won’t even need to mix it to get them to eat it. However, if you do have a picky eater, there are plenty of food types you can mix it with.

    Chewable Treats

    Chewable treats are the easiest way to give your cat a fish oil supplement, but keep in mind that they’re not usually as potent and that some cats won’t touch them. But if you do have a cat that likes the way they taste, giving your cat their daily fish oil supplement can be as easy as giving them a treat!

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    Conclusion

    If you’re still confused about which fish oil supplement is right for your cat after reading through the reviews, don’t overthink it. There’s a reason that the Nordic Naturals Omega-3 Pet Liquid Supplement is our top choice: It expertly combines performance and price in one product.

    However, if you are on a tighter budget, the PetHonesty Omega-3 Fish Oil is a great choice too for a good quality fish oil supplement for your cat!

    See also:


    Featured Image Credit: hppphnts, Shutterstock

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