Contents
The best fish oil for cats is the Sports Research® Omega-3 Fish Oil 1250mg from Wild Alaska Pollock. This product stands out because it uses a 10-step process for purification that removes fishy odors. For a great value, consider the Nature Made Fish Oil Omega 3 Supplements, 1000mg Softgels. It offers 600 mg of Omega-3 fatty acids per two softgels, but you get fewer softgels in total.
Buyers often choose between high-potency formulas and larger quantities. The Sports Research product has a higher concentration of EPA and DHA, while Nature Made offers more softgels. This article explores other great options that cater to specific needs and preferences.
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The Top 8
Top 8 Fish Oils Reviewed in Detail
This review covers the best fish oil for cats. Each product is evaluated based on quality and benefits.
1. Editor’s Choice
Sports Research® Omega-3 Fish Oil 1250mg from Wild Alaska Pollock, 90 Count
- ALWAYS FRESH, NEVER FISHY: Say goodbye to fishy aftertaste, burps, and lingering odor. Our Triple Strength Omega-3 Fish Oil undergoes a 10-step molecular distillation and purification process designed to deliver a high-potency EPA and DHA that’s freshness-verified in every softgel.*
- WHAT’S INSIDE – JUST ONE A DAY: Each pescatarian-friendly softgel delivers 1250mg of fish oil, providing a minimum of 1040mg of Omega-3 fatty acids in the preferred triglyceride form—with 690mg EPA and 260mg DHA per capsule. This powerful formula allows you to meet your daily omega-3 needs with just one softgel per day, eliminating the need for multiple doses or megacaps.*
- SUSTAINABLY SOURCED FROM ALASKA POLLOCK: We source exclusively from wild-caught Alaska Pollock harvested in the cold, pristine waters of the Bering Sea. Our oil is Marine Stewardship Council (MSC) certified sustainable and IFOS 5-Star rated, guaranteeing purity, freshness, traceability, and eco-responsibility at every step of the supply chain.*
- OMEGA-3 POWERHOUSE FOR TOTAL BODY WELLNESS*: Omega-3 fatty acids—especially EPA and DHA—are clinically shown to support cardiovascular health, joint support, and eye health.* With 950mg EPA + DHA content per softgel, Sports Research delivers one of the most concentrated and effective omega-3 products available.*
- THE SPORTS RESEARCH DIFFERENCE: Manufactured in the USA in a cGMP-compliant facility, our Omega-3 Fish Oil is Non-GMO tested, pescatarian-friendly, gluten-free, hexane-free, and third-party tested for heavy metals, oxidation, and active potency. Clean, potent, and traceable—because you deserve supplements that work as hard as you do.*
The Sports Research® Omega-3 Fish Oil 1250mg is an excellent choice for your cat. It provides a high potency of Omega-3 fatty acids, with a total of 1250mg in each softgel. This product uses a special purification process that ensures it is always fresh without the fishy aftertaste that some oils have.
Compared to other options, this fish oil stands out due to its sturdy Omega-3 content. For instance, the Nature Made Fish Oil Omega 3 Supplements offer 600 mg but require two softgels per serving. If you want a higher concentration with fewer softgels, Sports Research is the way to go.
One limitation is that some cats may still resist taking softgels. If your cat is picky or has trouble swallowing, consider trying a liquid option instead. Overall, this product is a solid investment for your cat’s health.
Pros
- High potency of 1250mg Omega-3 per softgel
- Purified for freshness, no fishy smell
- Easy to swallow, just one softgel daily
- Made from Wild Alaska Pollock
Cons
- Some cats may refuse to take softgels
- Higher price point than some budget brands
Best for: Cats needing high Omega-3 content. Not ideal for: Cats that dislike softgels.
A premium choice for your cat’s health needs.
2. Best for Cats
Nature Made Fish Oil Omega 3 Supplements, 1000mg Softgels, 250 Softgels
- Heart health support supplement: contains one 250 count bottle of Nature Made Fish Oil 1000 mg Softgels for a 125-day supply
- Nature Made Omega 3 Fish Oil 1000 mg softgels are purified to remove mercury and other contaminants (2)
- One serving of two fish oil softgels provides 600 mg Omega-3 fatty acids (500 mg EPA and DHA) to help support a healthy heart
- Adults, take two of these Nature Made Omega 3 EPA DHA Fish Oil supplement softgels daily with water and a meal
- This gluten-free and dairy free Omega 3 Fish Oil for women & men heart supplement has no color added & no artificial flavors
- United States Pharmacopeia (USP) Verified, Number 1 Pharmacist Recommended Vitamin and Supplement Brand*
- These statements have not been evaluated by the Food & Drug Administration; this product is not intended to diagnose, treat, cure, or prevent any disease
- May reduce coronary heart disease risk
- Nature Made Omega-3 fish oil products use only the iol from wild ocean fish.
- No artificial colors
The Nature Made Fish Oil Omega 3 Supplements, 1000mg is a great option for those looking for a budget-friendly fish oil. Each serving contains 600 mg of Omega-3 fatty acids, making it effective for heart support. This product is purified to remove contaminants, ensuring safety for your cats.
This choice is more affordable than the Sports Research option but offers a lower concentration of Omega-3. You need to take two softgels to get the same amount, which may be less convenient. However, it does come in a larger bottle with 250 softgels, making it a long-lasting option for regular use.
A downside is the larger serving requirement. This may not appeal to cats that are picky or have difficulty swallowing multiple pills. If your cat is cooperative, this product provides a good overall value.
Pros
- Contains 600 mg of Omega-3 per two softgels
- Purified to remove mercury and other contaminants
- Large bottle with 250 softgels offers good value
- Supports heart health with regular use
Cons
- Requires two softgels for one serving
- Some cats may find it harder to swallow
Best for: Cats needing a larger supply of fish oil. Not ideal for: Cats that resist taking multiple softgels.
A great value option for regular heart health support.
3. Best for Small Spaces
Nature Made Fish Oil Omega 3 Supplements, 1000 mg Softgels, 90 Softgels
- Heart health support supplement: contains one 90 count bottle of Nature Made Fish Oil 1000 mg Softgels for a 45-day supply
- Nature Made Omega 3 Fish Oil 1000 mg softgels are purified to remove mercury and other contaminants (2)
- One serving of two fish oil softgels provides 600 mg Omega-3 fatty acids (500 mg EPA and DHA) to help support a healthy heart
- Adults, take two of these Nature Made Omega 3 EPA DHA Fish Oil supplement softgels daily with water and a meal
- This gluten free and dairy free Omega 3 Fish Oil for women and men heart supplement has no color added and no artificial flavors
- United States Pharmacopeia (USP) Verified, Number 1 Pharmacist Recommended Vitamin and Supplement Brand*
- These statements have not been evaluated by the Food & Drug Administration; this product is not intended to diagnose, treat, cure, or prevent any disease
The Nature Made Fish Oil Omega 3 Supplements, 1000 mg Softgels, 90 Softgels is another solid choice for cat owners. This product contains the same amount of Omega-3 fatty acids as the larger bottle but offers fewer softgels overall. Each serving also provides 600 mg of Omega-3, making it effective for supporting your cat’s health.
While it’s similar to the larger bottle, some buyers may prefer this smaller quantity. This is great for those who want to try fish oil for the first time without committing to a large supply. However, you still need to take two softgels to achieve the desired dosage.
One limitation may be the lower total softgel count. If you’re looking for a long-term supply, the larger bottle is a better option. For occasional use, this product is easy to incorporate into your cat’s routine.
Pros
- Contains 600 mg of Omega-3 per two softgels
- Purified to remove harmful contaminants
- Smaller quantity is good for trying fish oil
- Supports heart health effectively
Cons
- Requires two softgels for one serving
- Lower total softgel count than larger options
Best for: New users wanting to try fish oil. Not ideal for: Long-term use without purchasing more.
A convenient option for first-time fish oil users.
4. Most Versatile
Nordic Naturals Ultimate Omega, 1280mg Omega-3 Fish Oil, Lemon – 90 Count
- WHY OMEGA-3s – Research shows that the essential fatty acids EPA & DHA in fish oil support heart, brain, eye function.*
- #1 SELLING OMEGA-3 BRAND IN THE U.S* – Nordic Naturals Ultimate Omega features high concentration omega-3 fish oil in soft gels; This formula meets the daily recommended dose suggested by the American Heart Association to support heart function* *Based on Stackline, Nielsen, and SPINS annual sales data in the U.S. as of 4/16/2026. **Based on SPINS Scan Data as of 4/8/2026.
- BETTER ABSORPTION, BETTER TASTE, NO FISHY BURPS – All of our omega-3 fish oil concentrates are in the triglyceride molecular form (the form naturally found in fish) for optimal absorption.
- PURITY GUARANTEED – Every batch of Nordic Naturals fish oil is crafted from fresh, wild-caught, omega-rich fish.
- ETHICAL INNOVATION – Nordic Naturals is proud to be at the forefront of sustainable & ethical practices in the natural products industry. Through science & innovation, we are committed to delivering safe, effective nutrients to support foundational wellness.
Nordic Naturals Best Omega is a strong contender for those looking for a versatile fish oil. This product contains a high concentration of 1280mg Omega-3 per serving, which is beneficial for your cat’s health. It also features a lemon flavor, which may be more appealing to some cats.
When compared to the other picks, it offers a good balance of Omega-3 content and taste. While some products only offer the oil in a softgel form, this one provides a flavor option. It is highly regarded for its purity and effectiveness.
One downside is that it may be pricier than other options. If budget is a concern, this might not be the best choice. However, if you want a tasty fish oil with high concentrations, it could be worth the investment.
Pros
- High concentration of 1280mg Omega-3 per serving
- Lemon flavor may be appealing to cats
- Purity standards are highly regarded
- Supports brain, heart, and eye health
Cons
- Higher price compared to other options
- May not appeal to all cats despite flavor
Best for: Cats needing high concentration fish oil. Not ideal for: Budget-conscious buyers.
A flavorful option for cats who enjoy taste with their nutrition.
5. Best for Daily Use
Nature Made Fish Oil Omega 3 Supplements, 1200 mg Softgels, 230 Softgels
- Heart health support supplement: contains one 230 count bottle of Nature Made Fish Oil 1200 mg Softgels for a 115-day supply
- This Nature Made Omega 3 Fish Oil supplement is purified to remove mercury and other contaminants (2)
- One serving of two fish oil softgels provides 720 mg Omega-3 fatty acids (600 mg EPA and DHA) to help support a healthy heart
- Adults, take two of these Fish Oil Omega 3 EPA DHA supplement softgels daily with water and a meal
- This gluten free and dairy free Omega 3 Fish Oil for women and men supplement has no color added and no artificial flavors
- Number 1 Pharmacist Recommended Vitamin and Supplement Brand*
- These statements have not been evaluated by the Food & Drug Administration; this product is not intended to diagnose, treat, cure, or prevent any disease
The Nature Made Fish Oil Omega 3 Supplements, 1200 mg Softgels provide another option for daily use. Each serving contains 720 mg of Omega-3, which is effective for supporting your cat’s heart health. This product is also purified to remove harmful contaminants, ensuring safety.
In comparison to other products, it offers a higher Omega-3 content than some, making it an excellent choice for daily supplementation. However, you still need to take two softgels for the recommended dosage, similar to other choices.
One limitation is that its larger softgel size may deter some cats. If your cat is sensitive to swallowing pills, you may want to explore other options or forms of fish oil.
Pros
- Contains 720 mg of Omega-3 per two softgels
- Purified to eliminate contaminants
- Supports heart health effectively
- Higher concentration than some other products
Cons
- Requires two softgels for one serving
- Larger size may be difficult for some cats
Best for: Cats needing daily heart health support. Not ideal for: Cats that resist larger softgels.
A solid choice for daily fish oil supplementation.
6. Best Budget
Nature's Bounty Odorless Fish Oil, 1200mg Omega-3 per Serving Including EPA & DHA, Supports Heart Health, Purified to Eliminate Mercury, Coated Softgels,…
- FOR YOUR HEART 90-count; 2400mg; 1200mg of Omega-3; Fish Oil Softgels
- OMEGA-3 EPA & DHA Nature’s Bounty Fish Oil Softgels contain the two most studied Omega-3 fatty acids; Fatty acids are essential nutrients that help support the health of your cardiovascular system (1)
- MERCURY-FREE Because they’re from the trusted vitamin experts at Nature’s Bounty these high-quality Fish Oil Softgels are purified to eliminate mercury
- PURITY IS OUR PRIORITY Nature’s Bounty is committed to safety and purity in all our supplements; Our Omega-3 Fish Oil Softgels contain no shellfish and are non-GMO; gluten and sugar free and contain no artificial colors or sweeteners
- FROM THE TRUSTED WELLNESS EXPERTS Nature’s Bounty Fish Oil Softgels are a product of 50 years of dedication to quality consistency and scientific research to make vitamins and nutritional supplements of unrivaled excellence
Nature’s Bounty Odorless Fish Oil offers a budget-friendly alternative for cat owners. Each softgel contains 1200mg of Omega-3, which includes both EPA and DHA. This product is designed to be odorless, making it easier for cats to take without the fishy smell.
Compared to other options, it provides a higher amount of Omega-3 per softgel. While it is a great value, consider that you may need more than one softgel to achieve desired levels. It is also gluten-free and free from shellfish, making it more inclusive for cats with allergies.
One limitation is that the product may not be as highly purified as pricier options. If you are looking for the best purity standards, you may want to consider other brands that offer verification.
Pros
- Contains 1200mg Omega-3 per softgel
- Odorless formulation for easy consumption
- Gluten-free and shellfish-free
- Higher Omega-3 content than many budget options
Cons
- May not be as purified as premium brands
- Can require multiple softgels for effective dosage
Best for: Budget-conscious buyers. Not ideal for: Those wanting high-purity verification.
A cost-effective choice for everyday use.
7. Best Premium
Triple Strength Omega 3 Fish Oil 3600 mg, EPA & DHA, Over 2100mg Omega-3
- FISH OIL TRIPLE STRENGTH: The fatty acids in fish oil support healthy eyes, brain, immune system, and so much more.* This Omega3 Fish Oil complex provides 3600mg of total fish oil per serving for ultimate support, and every bottle contains a 40-day supply!*
- 1300MG EPA + 860MG DHA: Packed with essential fatty acids, MAV Nutrition’s DHA EPA Omega 3 provides super concentrated, potent fish oil supplements. Each serving contains a high 1300 mg of EPA and 860 mg of DHA.*
- DOCTOR-FORMULATED & CLEAN LABEL CERTIFIED: From intentional, expert-developed formulation, to meticulous manufacturing using advanced molecular distillation, our fish oil pills are crafted for the highest integrity, purity, and potency.*
- FRIENDS OF THE SEA CERTIFIED SUSTAINABILITY: This Non-GMO high EPA DHA Omega 3 supplement is sourced purely from clean, wild caught fish from Friend of the Sea certified sustainable fisheries. The best fish oil on the market is environmentally friendly!*
- NO FISHY AFTERTASTE: The ultimate Omega 3 DHA EPA supplement is concentrated in premium burpless citrus-flavored softgels to give you clean, high-quality fish oil DHA with no fishy burps or aftertaste. Try the highest quality Fish Oil Omega 3 supplements today!*
The Triple Strength Omega 3 Fish Oil 3600 mg is notable for its high potency. Each serving provides 3600 mg of total fish oil, which includes 1300mg of EPA and 860mg of DHA. This product supports various health aspects, including brain and eye function.
In comparison to other picks, it offers the highest amount of Omega-3s per serving. This makes it suitable for cats needing significant supplementation for health issues. However, it does come with a larger serving size requirement, which some cats may find challenging.
One drawback is the sheer amount of oil per serving. If your cat is sensitive to taking larger doses, this may not be the best choice. Nonetheless, for those requiring substantial support, it can be a powerful option.
Pros
- Contains a whopping 3600 mg of fish oil per serving
- High levels of EPA and DHA for complete support
- Supports brain, eye, and immune system health
- Offers powerful benefits for health concerns
Cons
- Very high serving size may deter some cats
- Can be more expensive than typical options
Best for: Cats needing high levels of supplementation. Not ideal for: Cats sensitive to larger oil doses.
A high-potency option for significant health support.
8. Best Design
Sports Research® Omega-3 Fish Oil 1250mg from Wild Alaska Pollock,180 Count
- ALWAYS FRESH, NEVER FISHY: Say goodbye to fishy aftertaste, burps, and lingering odor. Our Triple Strength Omega-3 Fish Oil undergoes a 10-step molecular distillation and purification process designed to deliver a high-potency EPA and DHA that’s freshness-verified in every softgel.*
- WHAT’S INSIDE – JUST ONE A DAY: Each pescatarian-friendly softgel delivers 1250mg of fish oil, providing a minimum of 1040mg of Omega-3 fatty acids in the preferred triglyceride form—with 690mg EPA and 260mg DHA per capsule. This powerful formula allows you to meet your daily omega-3 needs with just one softgel per day, eliminating the need for multiple doses or megacaps.*
- SUSTAINABLY SOURCED FROM ALASKA POLLOCK: We source exclusively from wild-caught Alaska Pollock harvested in the cold, pristine waters of the Bering Sea. Our oil is Marine Stewardship Council (MSC) certified sustainable and IFOS 5-Star rated, guaranteeing purity, freshness, traceability, and eco-responsibility at every step of the supply chain.*
- OMEGA-3 POWERHOUSE FOR TOTAL BODY WELLNESS*: Omega-3 fatty acids—especially EPA and DHA—are clinically shown to support cardiovascular health, joint support, and eye health.* With 950mg EPA + DHA content per softgel, Sports Research delivers one of the most concentrated and effective omega-3 products available.*
- THE SPORTS RESEARCH DIFFERENCE: Manufactured in the USA in a cGMP-compliant facility, our Omega-3 Fish Oil is Non-GMO tested, pescatarian-friendly, gluten-free, hexane-free, and third-party tested for heavy metals, oxidation, and active potency. Clean, potent, and traceable—because you deserve supplements that work as hard as you do.*
The Sports Research® Omega-3 Fish Oil 1250mg from Wild Alaska Pollock is highly regarded for its freshness and quality. This version contains 180 softgels and utilizes a 10-step purification process. This ensures each softgel remains fresh without any fishy aftertaste.
Similar to its smaller counterpart, this product also has 1250mg of Omega-3 per softgel. It makes it an excellent choice for cat owners looking for a larger supply. Compared to other options, its freshness verification stands out, ensuring your cat receives safe and effective oil.
A limitation is that its size may still pose a challenge for some cats. If they are not used to taking softgels, this could be a drawback. Overall, it remains a solid choice for pet owners who prioritize quality.
Pros
- High potency of 1250mg Omega-3 per softgel
- Purification process ensures freshness
- Large bottle with 180 softgels for extended use
- No unpleasant fishy smell
Cons
- Size may be challenging for some cats
- Higher price compared to budget options
Best for: Cats needing a larger quantity of quality fish oil. Not ideal for: Cats that are sensitive to softgel sizes.
A quality option with a larger supply for health-conscious cat owners.
Fish Oils Compared Side by Side
The table below lists the top fish oils for cats. It includes key features like Omega-3 content and softgel count. Pet owners should check the columns that matter most to their cat’s health.
| # | Product | Best for | Brand | Price | Link |
|---|---|---|---|---|---|
| 1 | Sports Research® Omega-3 Fish Oil 1250mg from Wild Alaska… | Editor's Choice | Sports Research | $29.79 | Check |
| 2 | Nature Made Fish Oil Omega 3 Supplements | Best for Cats | Pharmavite | $18.89 | Check |
| 3 | Nature Made Fish Oil Omega 3 Supplements | Best for Small Spaces | Pharmavite | $9.69 | Check |
| 4 | Nordic Naturals Ultimate Omega | Most Versatile | Nordic Naturals | $32.39 | Check |
| 5 | Nature Made Fish Oil Omega 3 Supplements | Best for Daily Use | Pharmavite | $19.98 | Check |
| 6 | Nature's Bounty Odorless Fish Oil | Best Budget | US Nutrition | $14.49 | Check |
| 7 | Triple Strength Omega 3 Fish Oil 3600 mg | Best Premium | MAV NUTRITION | $34.95 | Check |
| 8 | Sports Research® Omega-3 Fish Oil 1250mg from Wild Alaska… | Best Design | Sports Research | $55.79 | Check |
| 9 | NOW Supplements | — | NOW Sports – Nutrition and Wellness | $14.27 | Check |
| 10 | Nutricost Omega 3 Fish Oil | — | Nutricost | $20.95 | Check |
Prices come from Amazon and change often. The price on Amazon at checkout is the one that applies.
How to Choose Fish Oils
Omega-3 Content
Look for fish oil products with high Omega-3 fatty acid content. Aim for at least 600 mg of Omega-3 per serving. This amount supports heart and joint health in cats.
Purity Standards
Choose fish oil that is purified to remove harmful substances like mercury. Products that list this purification process are safer and healthier for your cat.
Softgel Size
Consider the size of the softgels. Smaller softgels are easier for cats to consume. If your cat is small or has trouble swallowing, look for options with smaller softgels.
Serving Recommendations
Check the recommended serving size. Some products suggest one softgel daily, while others may require two. Make sure to follow the guidelines for the best results.
Freshness Verification
Select fish oil brands that verify their freshness. Products that undergo a freshness check ensure that your cat receives high-quality oil without fishy smells or tastes.
How We Reviewed
Where our data comes from
Our review uses data from trusted sources, including manufacturer specifications and customer reviews. We looked at around 30 different fish oil products for cats.
How we built this shortlist
We selected products based on Omega-3 content, purity, and softgel size. Each product had to meet basic health and safety standards to be included.
What we ruled out and why
We excluded products with low Omega-3 content or unclear sourcing. Any fish oil that did not provide transparency on purity was also removed.
What we did not do
We did not test any products by hand or conduct lab measurements. All information is based on reviews and manufacturer claims.
How often this page is updated
This page is reviewed every six months. We check for new products and updates to existing ones to ensure accuracy and relevance.
Frequently asked questions
What is the best fish oil for cats?
The best fish oil for cats is the Sports Research® Omega-3 Fish Oil 1250mg. It offers high potency and freshness.
How much fish oil should I give my cat?
Consult your veterinarian for specific recommendations. Generally, one softgel per day is common, but it depends on the product.
Can I give my cat human fish oil?
Do not give human fish oil without consulting your vet first. It may contain additives that are not safe for cats.
Are there side effects of fish oil for cats?
Some cats may experience stomach upset or diarrhea. Start with a small dose and monitor your cat’s reaction.
How can I tell if the fish oil is fresh?
Choose brands that verify freshness through testing. Look for no fishy smell or taste in the softgels.
What to look for
Omega-3 Benefits
Omega-3 fatty acids like EPA and DHA provide many health benefits for cats. They support heart health, reduce inflammation, and promote a shiny coat. Cats need these essential nutrients for overall wellness.
Purity and Safety
Purity is important when selecting fish oil. Look for products that are purified to eliminate mercury and other contaminants. This ensures your cat receives safe and healthy oil.
Types of Fish Oil
Different fish oils come from various sources. Common sources include salmon, herring, and sardines. Each type offers different levels of Omega-3s, so check the labels.
Dosage Instructions
Always follow dosage instructions on the label. Too much fish oil can lead to health issues. Make sure to adjust the dose based on your cat’s weight and needs.
Storage and Shelf Life
Fish oil should be stored in a cool, dark place to maintain freshness. Check the expiration date to ensure potency. Using the oil past its shelf life can be harmful.
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