The best fish oil supplements for pets balance a useful omega-3 source with a format your animal will actually take. I’d put Nordic Naturals Omega-3 Pet Fish Oil in the overall lead for its dog-and-cat focus and compact liquid format; Native Pet Omega-3 Fish Oil stands out for households wanting a larger bottle, while Nordic Naturals soft gels suit dogs that do better with a measured capsule. The main tradeoffs are liquid convenience versus portion control, small bottles versus fewer replacements, and pet-specific formulas versus simpler salmon oils. Read on for the full breakdown and help matching a pick to your pet’s routine.
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Key Takeaways
- Liquid oils dominate this lineup, but bottle size changes the buying experience: compact options suit first-time users, while larger bottles make more sense for established routines and multi-pet homes.
- Nordic Naturals’ pet liquid is the most versatile starting point among the listed options because it is explicitly positioned for both dogs and cats and avoids the commitment of a very large bottle.
- Soft gels and chews solve different compliance problems: capsules offer a pre-measured format, while chews may be easier for dogs that resist oil mixed into food.
- Salmon oil is not the same as a fully specified omega-3 dose; compare the label’s EPA and DHA amounts rather than choosing by fish source or bottle size alone.
- Large containers are not automatic value wins: freshness after opening, storage needs, and how quickly a household uses the product can outweigh the appeal of a bigger bottle.
| fish oil supplements for pet | Form | Volume | Target species | Active ingredients |
|---|---|---|---|---|
| Nordic Naturals Omega-3 Pet Fi | Liquid | 2 fl oz | Cats and dogs | — |
| Petsology Omega-3 Fish Oil Che | Soft chews | — | — | — |
| Nutri-Vet Fish Oil Softgels fo | Softgels | — | — | — |
| Chew + Heal Norwegian Salmon O | Liquid oil | 8 fl oz | Dog | — |
| Native Pet Omega-3 Fish Oil fo | Liquid oil | 8 fl oz | — | Wild-caught salmon oil and wild-caught pollock oil |
| Vital Pet Life Salmon and Poll | Liquid oil | 64 fluid ounces | — | Pollock oil and salmon oil |
| Native Pet Omega 3 Fish Oil fo | Liquid oil | — | — | Wild-caught salmon oil and wild-caught pollock oil |
| Chew + Heal Norwegian Salmon O | Liquid oil | 32 fluid ounces | Dog | — |
| Wonder Paws Norwegian Salmon O | Oil | 128 fluid ounces | — | — |
| Zesty Paws Salmon Oil for Dogs | Oil | 946 ml (32 fluid ounces) | — | Wild-caught Alaskan pollock oil, salmon oil, and tocopherols |
| Fera Pets Liquid Fish Oil | Liquid | 16 fluid ounces | Dogs and cats | — |
| Zesty Paws Salmon Oil for Dogs | Oil | 8.5 fluid ounces | Dogs and cats | Omega-3 fatty acids, including EPA and DHA |
| HEAPETS Wild Alaskan Salmon Oi | Liquid | 8 fluid ounces | Dogs and cats | Crude fat, omega-3 fatty acids, EPA, and DHA |
| Nordic Naturals Omega-3 Fish O | Soft gel capsules | — | Dog, cat | EPA and DHA |
| Natural Dog Company Wild Alask | Liquid oil | 16 fluid ounces | Dogs | EPA, DHA, omega-3, and omega-6 |
More Details on Our Top Picks
Nordic Naturals Omega-3 Pet Fish Oil for Dogs and Cats, 2 oz
Nordic Naturals is the most targeted pick for cats and small-breed dogs in this group. Its liquid delivers 294 mg of omega-3s per mL, including EPA and DHA, and the triglyceride form gives buyers a clearly stated concentration to work with. The small bottle and unflavored formula suit pets whose meals need a modest, easy-to-mix addition. Compared with Chew + Heal Norwegian Salmon Oil, which is a larger meal-topper bottle for dogs of all sizes, this option is more specifically aimed at smaller pets, but offers less volume. Its fish-based formula may not suit animals with fish sensitivities, and the supplied details do not include weight-based serving directions. I’d choose it for a small pet when the stated omega-3 amount matters more than a pump or a larger supply.
Pros:- Provides 294 mg of omega-3 fatty acids per mL, including EPA and DHA.
- Triglyceride-form oil offers a clearly identified form of omega-3.
- Unflavored liquid can be mixed into food.
- Made from wild-caught fish without artificial colors, flavors, or preservatives.
Cons:- The 2 fl oz bottle provides less volume than the 8 fl oz liquids in this group.
- Formulated for cats and small-breed dogs, making it a less direct fit for large dogs.
- Contains fish and may not suit pets with fish sensitivities.
Best for: Cat owners and owners of small-breed dogs who want a liquid with a stated omega-3 amount per milliliter.
Not ideal for: Owners of large dogs seeking a larger-volume bottle, or pets that cannot tolerate fish ingredients.
- Form:Liquid
- Volume:2 fl oz
- Omega-3 per mL:294 mg
- Active ingredient:Omega-3 fatty acids, including EPA and DHA
- Target species:Cats and dogs
- Recommended dog size:Small breeds
- Flavor:Unflavored
- Allergen:Fish
Our verdict“Choose Nordic Naturals for a small dog or cat when you want liquid fish oil with a stated omega-3 concentration.”
Petsology Omega-3 Fish Oil Chews for Dogs, 250 Count
Petsology is the chew-format choice for dogs that resist oil mixed into meals. The chicken-flavored soft chews are described for dogs of all sizes and combine fish oil, salmon oil, EPA, DHA, and probiotics. That makes the format more appealing to some dogs than a liquid like Native Pet Omega-3 Fish Oil, which is served over food with a pump. The tradeoff is that Petsology does not state the amount of EPA or DHA per chew, and the listing also omits feeding instructions; that leaves less information for owners comparing dose and daily routine. Its claims include skin, coat, shedding, itch, joint, and heart support, but buyers should not assume the broad list replaces a clear nutrient amount. I’d pick it for convenience, not dose transparency.
Pros:- Soft-chew format avoids mixing oil into food.
- Chicken flavor may suit dogs that reject unflavored liquids.
- Formulated for small, medium, and large dogs.
- Includes fish oil, salmon oil, EPA, DHA, and probiotics.
Cons:- EPA and DHA amounts per chew are not provided.
- Feeding instructions are not provided in the supplied product details.
- Fish-oil ingredients may not suit dogs with fish sensitivities.
Best for: Owners of dogs that refuse liquid supplements and will reliably take a chicken-flavored soft chew.
Not ideal for: Owners who need a clearly stated EPA/DHA amount or feeding directions before choosing a daily supplement.
- Form:Soft chews
- Count:250
- Flavor:Chicken
- Pet type:Dog
- Dog sizes:Small, medium, and large
- Key ingredients:Fish oil, EPA, DHA, salmon oil, and probiotics
- Allergen information:Gelatin free
Our verdict“Pick Petsology if your dog prefers flavored chews and you can confirm appropriate feeding directions from the product label.”
Nutri-Vet Fish Oil Softgels for Dogs, Omega-3 Skin and Coat Support, 100 Count
Nutri-Vet stands apart as the softgel option for owners who would rather give a capsule than pour oil over food. Each softgel is described as providing 300 mg of omega-3 fatty acids, including EPA and DHA, plus vitamins A, D, and E. That nutrient detail is more specific than Petsology’s chew listing, which does not state EPA or DHA amounts, though the two products differ in format and audience. Nutri-Vet is listed for large-breed dogs, so it is not the obvious pick for smaller pets; the supplied information does not clarify a small-dog serving approach. The capsules can be offered as a treat or with meals, but seafood flavor and fish-derived oil may not suit every dog. I’d favor it when a large dog accepts softgels and owners want added vitamins alongside omega-3s.
Pros:- Provides 300 mg of omega-3 fatty acids, including EPA and DHA.
- Includes vitamins A, D, and E alongside fish oil.
- Softgels can be offered as a treat or given with meals.
- Veterinarian-formulated and made in the USA with globally sourced ingredients.
Cons:- Listed for large-breed dogs, limiting its fit for smaller pets.
- Seafood flavor may put off dogs that are selective about supplements.
- Softgels are less convenient than a pump liquid for owners who prefer to mix supplements into food.
Best for: Owners of large-breed dogs who prefer softgels and want omega-3s paired with vitamins A, D, and E.
Not ideal for: Owners of cats or small dogs, or dogs that refuse capsules or seafood-flavored supplements.
- Form:Softgels
- Count:100
- Omega-3 fatty acids:300 mg
- Includes:EPA, DHA, vitamins A, D, and E
- Flavor:Seafood
- Recommended dog size:Large
- Made in:USA
- Allergen information:Banana free
Our verdict“Choose Nutri-Vet for a large dog that accepts softgels and may benefit from a fish-oil option with added vitamins.”
Chew + Heal Norwegian Salmon Oil for Dogs, 8 oz
Chew + Heal is the straightforward dog-only liquid in this group: add salmon oil to meals rather than offer a chew or softgel. Its 8 fl oz bottle gives it more volume than the 2 fl oz Nordic Naturals bottle, while the product is described for dogs of all sizes. Vitamin E is an added component alongside omega-3 fatty acids, but the supplied details do not give an omega-3 concentration or a dosing measure. That makes it less transparent for owners comparing nutrient amounts than Nordic Naturals Omega-3 Pet Fish Oil, which specifies omega-3 per milliliter and targets smaller pets. The simple formula and meal-mixing format are practical, but this is not a cat formula, and fish is a clear limitation for sensitive dogs. I’d choose it when an uncomplicated salmon-oil topper matters more than detailed dose information.
Pros:- Liquid oil is easy to add to a dog’s meal.
- The 8 fl oz bottle holds more than Nordic Naturals’ 2 fl oz option.
- Described for dogs of all sizes.
- Includes vitamin E along with omega-3 fatty acids.
Cons:- The supplied product details do not state omega-3 amounts per serving.
- No serving directions are provided in the supplied details.
- Dog-only formula and fish content limit its suitability for cats and fish-sensitive pets.
Best for: Dog owners who want a larger liquid salmon-oil bottle to mix into meals for dogs of different sizes.
Not ideal for: Cat owners, fish-sensitive dogs, or buyers who need a stated omega-3 concentration to compare servings.
- Form:Liquid oil
- Volume:8 fl oz
- Flavor:Salmon
- Target species:Dog
- Key nutrients:Omega-3 fatty acids and vitamin E
- Allergen information:Fish
- Manufacturer:Chew + Heal
Our verdict“Choose Chew + Heal for a simple, larger-volume meal topper for dogs if you do not need a stated omega-3 dose.”
Native Pet Omega-3 Fish Oil for Dogs and Cats, 8 oz
Native Pet is the most convenient shared dog-and-cat liquid among these five, thanks to its locking pump and 8 fl oz bottle. The blend pairs wild-caught Alaskan salmon oil with pollock oil and supplies omega-3, -6, and -9 fatty acids, giving it a broader fatty-acid profile than the single salmon-oil source described for Chew + Heal Norwegian Salmon Oil. The pump can make serving over food tidier, though owners still need to check the label for weight-based dosing. The product lists an approximate 30-day supply for a typical dog, but actual use depends on the pet and serving amount. It is intended for dogs and cats of all dog sizes, yet the supplied information advises veterinary consultation before use for puppies or nursing pets. I’d choose it for multi-pet households that value an easy dispenser over a stated omega-3 amount per milliliter.
Pros:- Suitable for both dogs and cats.
- Combines wild-caught Alaskan salmon oil and pollock oil.
- Provides omega-3, -6, and -9 fatty acids.
- Locking pump simplifies serving the oil over food.
Cons:- Weight-based dosing requires checking the label.
- The supplied details do not state an omega-3 amount per serving.
- Veterinary consultation is advised before use for puppies or nursing pets.
Best for: Households with dogs and cats that want one pump-dispensed fish-oil blend for adding to food.
Not ideal for: Owners who need a stated omega-3 amount per serving, or those who want to use it for puppies or nursing pets without veterinary guidance.
- Form:Liquid oil
- Volume:8 fl oz
- Pet types:Dogs and cats
- Active ingredients:Wild-caught salmon oil and wild-caught pollock oil
- Fatty acids:Omega-3, omega-6, and omega-9
- Dispenser:Locking pump
- Dog breed size:All sizes
- Typical dog supply:Approximately 30 days
Our verdict“Choose Native Pet for a dog-and-cat household that wants a pump-dispensed blend and is comfortable following label-based dosing.”
Vital Pet Life Salmon and Pollock Fish Oil for Pets, 64 fl oz
The 64-ounce size and broad list of eligible animals make this a practical pick for households caring for more than one kind of pet. Its salmon and pollock oils provide EPA and DHA, with stated support for skin and coat, normal shedding, immune function, and heart health. Compared with Wonder Paws Norwegian Salmon Oil, which is a large-format option aimed at dogs, Vital Pet Life lists cats, ferrets, small animals, fish, and horses as target pets too. It also stands out for NASC certification and independent ORIVO testing of marine-oil origin and authenticity. The tradeoff is storage and use: a four-pound, 64-ounce bottle can be cumbersome, and the supplied details do not specify a pump or serving guide. It may be more oil than a single small pet needs before the bottle is used up.
Pros:- Contains salmon and pollock oils that provide EPA and DHA.
- Lists a wide range of target animals, including cats, dogs, ferrets, and horses.
- NASC certified and independently tested by ORIVO for marine-oil origin and authenticity.
- Large 64-fluid-ounce volume may suit households using oil across multiple pets.
Cons:- The large bottle is bulky and may be excessive for a single small pet.
- The supplied product details do not list a pump or serving-size guide.
- Fish-based oil is unsuitable for pets with fish sensitivities.
Best for: Households with several pets or multiple species that want one large liquid fish-oil supplement and value independent sourcing checks.
Not ideal for: Owners of one small pet, or anyone needing a compact bottle, a stated serving guide, or a listed pump for portioning.
- Form:Liquid oil
- Volume:64 fluid ounces
- Item weight:4.1 pounds
- Active ingredients:Pollock oil and salmon oil
- Flavor:Fish
- Target pets:Cats, dogs, ferrets, small animals, fish, and horses
- Certifications and testing:NASC certified; independently tested by ORIVO
Our verdict“Choose Vital Pet Life if you need a large, independently tested fish-oil supply for a mixed-pet household and have room to store it.”
Native Pet Omega 3 Fish Oil for Dogs & Cats – Wild Alaskan Salmon & Pollock Oil – Supports Skin, Coat, Joints, Heart & Shedding – 16 oz
A leak-proof pump is the clearest reason to choose this bottle: it makes adding oil to meals simpler than pouring from an unpumped container such as Chew + Heal Norwegian Salmon Oil. Native Pet pairs wild-caught Alaskan salmon and pollock oils, and its natural fish scent may help owners whose dogs or cats resist less aromatic supplements. The description lists support for skin, coat, joints, and heart health, while its omega-3, 6, and 9 profile gives it broader stated fatty-acid coverage than products described mainly around omega-3s. The compromise is the odor, which can be unpleasant for people and may not appeal to every pet. Its 16-ounce format is also less suited to high-volume, multi-pet use than Vital Pet Life’s 64-ounce bottle.
Pros:- Leak-proof pump supports controlled, less-messy meal dosing.
- Combines wild-caught salmon and pollock oils.
- The description lists omega-3, 6, and 9 fatty acids.
- Fish scent may make the oil appealing to some picky eaters.
Cons:- Strong fish odor may be off-putting to some owners.
- The 16-ounce bottle offers less supply than the larger Vital Pet Life and Wonder Paws options.
- Fish-based ingredients may not suit pets with fish sensitivities.
Best for: Dog and cat owners who want a pump-dispensed fish oil for regular meal additions and have pets that respond well to fish scent.
Not ideal for: Owners sensitive to strong fish odor or households that need a large bottle for several pets.
- Form:Liquid oil
- Bottle size:16 ounces
- Listed item weight:16 ounces
- Active ingredients:Wild-caught salmon oil and wild-caught pollock oil
- Fatty acid profile:Omega-3, 6, and 9
- Target pets:Dogs and cats
- Dispensing feature:Leak-proof pump
Our verdict“Pick Native Pet for a convenient pump and dual fish oils in a moderate-size bottle, provided the fish scent is acceptable in your home.”
Chew + Heal Norwegian Salmon Oil for Dogs and Cats, 32 oz
A simple salmon-oil formula makes this a focused choice for owners looking to add a liquid supplement to a dog’s meal for skin and coat support. It provides omega-3 fatty acids and vitamin E, and the 32-ounce bottle is more moderate in size than the four-liter-class Wonder Paws Norwegian Salmon Oil. Chew + Heal also lists USA manufacture and suitability for dogs of all sizes. Compared with Zesty Paws Salmon Oil, whose description includes salmon and pollock oils and names several broader wellness goals, this product is presented more narrowly around coat health. That simpler positioning may suit buyers who do not need a broader list of stated benefits, but the provided details do not identify a pump or serving guide. Fish is also a stated allergen, and the target-species field lists dogs, so cat owners should check suitability before buying.
Pros:- Provides omega-3 fatty acids and vitamin E.
- Liquid form can be added to meals.
- Listed as suitable for dogs of all sizes.
- Made in the USA.
Cons:- Fish is listed as an allergen, which rules it out for pets with fish sensitivities.
- The supplied details focus on dogs despite the product title mentioning cats.
- No pump or serving-size guide is listed in the supplied product data.
Best for: Dog owners seeking a mid-size liquid salmon oil with vitamin E for adding to meals, especially when coat support is the main goal.
Not ideal for: Owners of fish-sensitive pets, cat households seeking a clearly listed cat-specific product, or buyers who need a pump and serving directions listed.
- Form:Liquid oil
- Volume:32 fluid ounces
- Weight:2 pounds
- Flavor:Salmon
- Key ingredients:Salmon oil, omega-3 fatty acids, and vitamin E
- Specific use:Coat health
- Target species:Dog
- Allergen information:Fish
- Manufacturing origin:Made in the USA
Our verdict“Choose Chew + Heal for a moderate-size, meal-mixable salmon oil aimed at dog coat support, but look elsewhere if you need clearer cat guidance or pump dosing.”
Wonder Paws Norwegian Salmon Oil for Dogs, 128 fl oz
The 128-ounce jug is the defining feature here: it suits dog owners who want a large supply and can store a bulky container. The Norwegian-sourced salmon oil provides omega-3, 6, and 9 fatty acids, including EPA and DHA, and the included pump lets owners add it to food, kibble, or water. Its listed support areas span skin, coat, joints, mobility, heart, and immune health. Compared with Vital Pet Life Salmon and Pollock Fish Oil, Wonder Paws is explicitly aimed at dogs rather than a broad range of species, but it offers twice the listed volume. The tradeoff is practical: the eight-pound container takes space, and the product details do not provide a serving-size guide. Owners with a small dog or limited storage may prefer Chew + Heal’s 32-ounce bottle.
Pros:- Large 128-fluid-ounce supply may suit regular use across multiple dogs.
- Includes a pump for dispensing into food, kibble, or water.
- Norwegian-sourced salmon oil provides omega-3, 6, and 9 fatty acids, including EPA and DHA.
- NASC certified and made in an FDA-registered, GMP-certified facility.
Cons:- The eight-pound container may be bulky to store and handle.
- The supplied product description does not provide a serving-size guide.
- Dog-only positioning makes it less versatile than Vital Pet Life, which lists multiple target species.
Best for: Owners of one or more dogs who use liquid oil regularly, have space for a large container, and want pump dispensing.
Not ideal for: Owners of small dogs with low supplement use, households with limited storage, or buyers who need serving directions stated in the product details.
- Form:Oil
- Volume:128 fluid ounces
- Item weight:8 pounds
- Key ingredient:Norwegian-sourced salmon oil
- Fatty acids:Omega-3, 6, and 9, including EPA and DHA
- Target pet:Dogs of all breed sizes
- Included component:Pump
- Certifications and facility:NASC certified; made in an FDA-registered and GMP-certified facility
Our verdict“Choose Wonder Paws if your dog household can use and store a 128-ounce supply; otherwise, a smaller bottle may be easier to manage.”
Zesty Paws Salmon Oil for Dogs and Cats, 32 oz
For a shared dog-and-cat household, this 32-ounce oil combines salmon and wild-caught Alaskan pollock with a pump for adding it to meals. The formula provides EPA and DHA, and its listed support areas include skin and coat, joints, heart, and immune health. That broader positioning sets it apart from Chew + Heal Norwegian Salmon Oil, whose supplied details center on coat support and list dogs as the target species. Zesty Paws is also more manageable than the very large Wonder Paws 128-ounce jug, while still offering more volume than Native Pet’s 16-ounce bottle. The tradeoff is that the supplied data does not specify a serving guide or certifications, so owners wanting those details may prefer Vital Pet Life, which lists independent testing. Fish-based ingredients also make this a poor match for pets with fish sensitivities.
Pros:- Contains salmon and wild-caught Alaskan pollock oils with EPA and DHA.
- Suitable for both cats and dogs of all sizes.
- Pump makes it easy to add oil to food.
- Lists support for skin and coat, joints, heart, and immune health.
Cons:- The supplied product details do not state a serving-size guide.
- No certification or independent testing information is provided in the supplied data.
- Fish-based ingredients may not suit pets with fish sensitivities.
Best for: Owners of cats and dogs who want one pump-dispensed fish oil with EPA and DHA and several stated wellness support areas.
Not ideal for: Owners seeking independent sourcing-test details or serving directions in the product information, and anyone whose pet is sensitive to fish.
- Form:Oil
- Volume:946 ml (32 fluid ounces)
- Weight:2 pounds
- Active ingredients:Wild-caught Alaskan pollock oil, salmon oil, and tocopherols
- Key fatty acids:Omega-3 fatty acids, including EPA and DHA
- Target pets:Cats and dogs
- Included component:Pump
- Listed benefits:Skin and coat care, joint health, heart health, and immune support
Our verdict“Choose Zesty Paws for a mid-size, pump-dispensed oil shared by cats and dogs, but favor Vital Pet Life if independent testing details matter more.”
Fera Pets Liquid Fish Oil – Non GMO Omega 3 for Dogs & Cats, 16 oz
For buyers who want stated EPA and DHA amounts rather than a general omega-3 claim, Fera Pets gives a concrete dose to compare: 700 mg EPA and 400 mg DHA per serving. Its blend of five wild-caught fish and added vitamin E sets it apart from Zesty Paws Salmon Oil, whose supplied product details do not state amounts per serving. The 16-ounce bottle also provides more volume than HEAPETS’ 8-ounce option, though both are liquids mixed into food. That convenience comes with work: you must measure each serving, and the product information says to use the opened bottle within three months. Molecular distillation and GMP-compliant manufacturing are useful sourcing and production details, but this is still a fish-flavored oil that may not suit pets that reject oily food.
Pros:- Lists 700 mg EPA and 400 mg DHA per serving
- Five wild-caught fish sources and added vitamin E
- Molecularly distilled, non-GMO, and GMP-compliant
- Formulated for both dogs and cats
Cons:- Liquid needs careful measurement and can spill during serving
- Opened product should be used within three months
- Fish flavor may not appeal to every pet
Best for: Dog and cat owners who want stated EPA and DHA amounts, a larger bottle, and a liquid they can mix into meals.
Not ideal for: Owners who need a no-mess option, do not want to measure servings, or expect to use an opened bottle slowly beyond three months.
- Form:Liquid
- Volume:16 fluid ounces
- Target species:Dogs and cats
- EPA:700 mg per serving
- DHA:400 mg per serving
- Fish sources:Wild-caught pollock, sardines, anchovies, herring, and mackerel
- Additional ingredient:Vitamin E (D-alpha tocopherol)
- Processing and production:Molecularly distilled; non-GMO; GMP-compliant; made in the USA
Our verdict“Choose Fera Pets if you want a liquid for dogs or cats with stated EPA and DHA amounts and can manage measured, timely use.”
Zesty Paws Salmon Oil for Dogs and Cats, 8.5 fl oz
Zesty Paws is a straightforward liquid topper for owners who would rather mix oil into a meal than give a capsule. The salmon-and-pollock blend supplies EPA and DHA and is made for dogs and cats of all sizes. Compared with Fera Pets Liquid Fish Oil, it has a similar mix-in format but the supplied details do not give EPA or DHA amounts per serving; buyers focused on dose transparency may prefer Fera. The 8.5-ounce bottle is also smaller than Fera’s 16-ounce size and Natural Dog Company’s 16-ounce bottle. Its appeal is simplicity, but the product information does not provide dosage instructions, leaving owners without a clear serving guide from these details. That makes it a less informative choice for anyone who wants to calculate intake precisely.
Pros:- Oil can be mixed into food instead of giving capsules
- Includes EPA and DHA omega-3 fatty acids
- Uses wild-caught Alaskan pollock and salmon
- Formulated for dogs and cats of all sizes
Cons:- No dosage instructions are provided in the supplied product details
- EPA and DHA quantities per serving are not stated
- Smaller bottle than the 16-ounce Fera Pets and Natural Dog Company options
Best for: Dog and cat owners seeking a pump-style food topper and who are comfortable obtaining serving guidance separately.
Not ideal for: Buyers who need stated EPA and DHA quantities or clear dosage instructions in the product information.
- Form:Oil
- Volume:8.5 fluid ounces
- Target species:Dogs and cats
- Fish sources:Wild-caught Alaskan pollock and salmon
- Active ingredients:Omega-3 fatty acids, including EPA and DHA
- Additional ingredients:Tocopherols
- Intended uses:Skin and coat, joints, heart, and immune support
- Dog size:All sizes
Our verdict“Pick Zesty Paws for a basic salmon-and-pollock food topper, but choose Fera Pets if stated omega-3 amounts and serving details matter more.”
HEAPETS Wild Alaskan Salmon Oil for Dogs and Cats, 8 oz
HEAPETS stands out for what it leaves out: the product description says it has no filler oils, soy, corn, wheat, artificial flavors, or synthetic colors. That makes it a distinct choice for owners who are screening ingredients, while Nordic Naturals Omega-3 Fish Oil for Dogs differentiates itself with a stated omega-3 amount and soft-gel format. HEAPETS is an 8-ounce liquid for both dogs and cats, and its included pump can make meal mixing less fiddly than pouring oil from a bottle. The tradeoff is limited dosing detail: EPA and DHA are named, but amounts and serving instructions are not provided in the supplied information. Third-party testing is also claimed in the description without further specifics. Compared with Fera Pets, HEAPETS offers more emphasis on ingredient exclusions than quantified potency.
Pros:- Description excludes filler oils, soy, corn, wheat, artificial flavors, and synthetic colors
- Pump is included for mixing oil into food
- Formulated for dogs and cats of small, medium, and large sizes
- Product description says it is third-party tested
Cons:- EPA and DHA amounts per serving are not stated
- Dosage instructions are not provided in the supplied details
- Third-party testing details are not specified
Best for: Pet owners who want a fish-oil liquid for dogs or cats and prioritize avoiding listed fillers, common grains, and artificial colors or flavors.
Not ideal for: Owners who need an EPA/DHA amount per serving, detailed dose guidance, or a clearly specified testing standard.
- Form:Liquid
- Volume:8 fluid ounces
- Target species:Dogs and cats
- Active ingredients:Crude fat, omega-3 fatty acids, EPA, and DHA
- Included component:Bottle with pump
- Suitable dog sizes:Small, medium, and large
- Allergen information:Soy-free
- Product description claims:Third-party tested; no filler oils, soy, corn, wheat, artificial flavors, or synthetic colors
Our verdict“Choose HEAPETS when ingredient exclusions and a food-mixing pump matter more than published dose amounts or detailed testing information.”
Nordic Naturals Omega-3 Fish Oil for Dogs, 180 Soft Gels
For owners who do not want to pour or measure a liquid, Nordic Naturals offers a soft-gel alternative to food toppers such as Natural Dog Company Wild Alaskan Salmon Oil. Each serving supplies 320 mg of omega-3, including EPA and DHA, giving buyers a stated amount that is absent from the supplied details for Zesty Paws and HEAPETS. The wild-caught fish oil is in triglyceride form, and the formula is described as non-GMO and free of gluten, dairy, artificial colors, flavors, and preservatives. The main compromise is format: capsules may be awkward for pets that resist swallowing them, while a liquid can be mixed into food. Although the listing names dogs and cats as target species, its product name and description focus on dogs; cat owners should check the label directions before choosing it.
Pros:- Provides 320 mg of omega-3 per serving, including EPA and DHA
- Soft-gel format avoids pouring liquid into meals
- Made from wild-caught fish in triglyceride form
- Non-GMO and free of gluten, dairy, artificial colors, flavors, and preservatives
Cons:- Capsules may be harder to give than liquid toppers such as Natural Dog Company oil
- Product instructions specify using pet products rather than the brand’s human fish oil
- The product name and description focus on dogs despite the listed dog-and-cat target
Best for: Dog owners who prefer a pre-portioned soft gel over adding liquid oil to meals and want a stated omega-3 amount.
Not ideal for: Pets that will not take soft gels, owners who prefer a food-mixable liquid, or cat owners who need species-specific directions confirmed.
- Form:Soft gel capsules
- Unit count:180
- Omega-3 per serving:320 mg
- Active ingredients:EPA and DHA
- Fish source and form:Wild-caught fish oil in triglyceride form
- Flavor:Unflavored
- Target species:Dog, cat
- Formula exclusions:Non-GMO; gluten-free; dairy-free; no artificial colors, flavors, or preservatives
Our verdict“Choose Nordic Naturals if your dog accepts soft gels and you want a stated omega-3 amount without handling a liquid topper.”
Natural Dog Company Wild Alaskan Salmon Oil for Dogs, 16 oz
Natural Dog Company makes serving guidance its main advantage: the pump dose changes by dog weight, from one pump for dogs up to 25 pounds to three pumps for dogs over 75 pounds. That is more actionable than the supplied details for Zesty Paws Salmon Oil, which provide no dosage instructions. Its 16-ounce bottle matches Fera Pets in volume, but this product is specifically for dogs, while Fera is formulated for dogs and cats and lists EPA and DHA amounts per serving. The wild-caught Alaskan salmon and pollock oils provide EPA, DHA, omega-3, and omega-6 fatty acids, and the description says there are no fillers or artificial additives. The tradeoff is a daily liquid routine and weight-based pumping; owners looking for capsules or a quantified EPA/DHA dose may prefer Nordic Naturals or Fera.
Pros:- Pump dosing is specified for three dog weight ranges
- 16-ounce bottle of wild-caught Alaskan salmon and pollock oils
- Provides EPA, DHA, omega-3, and omega-6 fatty acids
- Description states there are no fillers or artificial additives and cites Orivo verification for species and origin
Cons:- Made for dogs rather than both dogs and cats
- Requires consistent daily use and weight-based dose adjustment
- EPA and DHA amounts per serving are not provided
Best for: Dog owners who want a larger liquid topper with pump guidance scaled to their pet’s weight.
Not ideal for: Cat owners, buyers seeking a capsule, or anyone who needs EPA and DHA amounts per serving stated in the product details.
- Form:Liquid oil
- Volume:16 fluid ounces
- Target species:Dogs
- Fish sources:Wild-caught Alaskan salmon and pollock oils
- Active ingredients:EPA, DHA, omega-3, and omega-6
- Suggested dose:1 pump up to 25 lb; 2 pumps for 26–75 lb; 3 pumps over 75 lb
- Included component:Bottle with pump
- Sourcing verification:Verified by Orivo for species and origin
Our verdict“Choose Natural Dog Company if your dog takes liquid food toppers and you want pump directions tied to weight, rather than a capsule or a stated EPA/DHA dose.”
How We Picked
I ranked these 15 options around the decisions that affect daily use: whether the product is meant for dogs, cats, or both; whether it comes as liquid, soft gels, or chews; how easy it is to portion; and whether the listed package size suits a single pet or a busier household. I also treated label transparency as a key comparison point, especially the clarity of omega-3 details and serving guidance. Fish source and stated purpose help distinguish options, but a familiar ingredient name alone does not establish the amount of EPA and DHA in a serving.
The order favors products that appear adaptable to more households and routines, then separates larger-volume, single-species, and alternate-format choices by their intended fit. A large bottle can be practical for regular use but less appealing for a pet new to supplements; a capsule can simplify measuring but may be hard to give to a reluctant animal. Product names and package sizes are not a substitute for checking the current label, so I would verify ingredient details, species directions, and storage instructions before buying.
| fish oil supplements for pet | Form | Target species |
|---|---|---|
| Nordic Naturals Omega-3 Pet Fi | Liquid | Cats and dogs |
| Petsology Omega-3 Fish Oil Che | Soft chews | — |
| Nutri-Vet Fish Oil Softgels fo | Softgels | — |
| Chew + Heal Norwegian Salmon O | Liquid oil | Dog |
| Native Pet Omega-3 Fish Oil fo | Liquid oil | — |
| Vital Pet Life Salmon and Poll | Liquid oil | — |
| Native Pet Omega 3 Fish Oil fo | Liquid oil | — |
| Chew + Heal Norwegian Salmon O | Liquid oil | Dog |
| Wonder Paws Norwegian Salmon O | Oil | — |
| Zesty Paws Salmon Oil for Dogs | Oil | — |
| Fera Pets Liquid Fish Oil | Liquid | Dogs and cats |
| Zesty Paws Salmon Oil for Dogs | Oil | Dogs and cats |
| HEAPETS Wild Alaskan Salmon Oi | Liquid | Dogs and cats |
| Nordic Naturals Omega-3 Fish O | Soft gel capsules | Dog, cat |
| Natural Dog Company Wild Alask | Liquid oil | Dogs |
Factors to Consider When Choosing Best Fish Oil Supplements For Pets
Before choosing from this list, I’d match the supplement to the pet’s routine and the reason for adding it—not just the fish source on the front label. These factors can help distinguish a useful daily fit from a format or package that creates avoidable hassle.
Compare EPA and DHA, Not Just the Fish Source
Salmon, pollock, and other fish oils can all supply omega-3 fats, but the source name does not tell you how much EPA and DHA is in each serving. Look for those amounts on the label and compare them on a per-serving basis, not only by total bottle volume. A product listing that gives only a broad “fish oil” or “omega-3” claim leaves more uncertainty about what a portion provides. Avoid assuming that two oils are interchangeable because both feature salmon. If your pet has a medical condition or takes medication, ask your veterinarian what product details and dose are appropriate before adding oil.
Choose a Format Your Pet Will Accept
Liquid is easy to mix into food, but it may change the smell or texture of a meal, which can put off a selective eater. Soft gels give you a defined unit and avoid pouring, though some pets will not swallow them and some owners may need to open the capsule. Chews can be convenient for dogs that enjoy treats, yet they are not a natural fit for every cat or dog with dietary restrictions. Consider your pet’s eating habits before buying a large supply. A smaller package or a format that can be introduced gradually can reduce waste if acceptance is uncertain.
Match Bottle Size to Use and Freshness
A large container may suit a household with several pets or a routine already established, while a compact bottle can be a better trial size. Fish oils can be sensitive to air, light, and heat, so follow the label’s storage directions and note how long the bottle is expected to last after opening. A container that sits for months may be less convenient than replacing a smaller one more often. Do not choose by volume alone: serving directions and the pet’s size affect how quickly a bottle is used. Check whether the packaging makes dispensing and resealing easy for your routine.
Check Species Directions and Household Fit
Some products are labeled for dogs and cats, while others are presented for dogs specifically. If you have both species, a shared product can simplify storage, but only when its directions clearly cover each animal. Do not assume a dog serving can be scaled down safely for a cat. Review the label for species-specific guidance, ingredients, and any warnings before use. If either pet has allergies, a restricted diet, or ongoing health care, confirm the product is suitable with a veterinarian.
Use Serving Guidance, Not a Bigger Pour
More oil is not automatically better, and an unmeasured pour can make a routine inconsistent. Follow the product’s serving directions and use a pump, marked spoon, or capsule count as directed. Compare the suggested amount with your pet’s weight range rather than borrowing a serving from another brand. Introducing a new oil gradually may help you spot digestive changes or food refusal, but follow professional advice if your pet has a health concern. Keep track of the amount added when multiple household members feed the pet.
Know When to Pay More Attention to the Label
When products differ in format or bottle size, the clearest label can be more useful than a long list of broad benefit claims. Look for ingredient details, EPA and DHA amounts, species instructions, serving information, and storage guidance. A premium-positioned product is not automatically a better match if its format is difficult to administer or its container is too large for your household. Conversely, a basic oil may leave key dose details unclear. If you are choosing fish oil for a specific health concern, ask your veterinarian to help interpret the label rather than treating a supplement as a replacement for care.
Frequently Asked Questions
How do I choose between liquid fish oil, soft gels, and chews?
I’d start with the form your pet is most likely to take reliably. Liquid works well when your pet accepts food toppers and you can measure each serving; soft gels offer a defined unit but can be difficult for pets that resist capsules. Chews may suit dogs who take treats readily, although they add another texture and ingredient list to check. If you are unsure, try a smaller package before committing to a large container. Follow the label rather than substituting one format’s serving for another.
Can I use one fish oil supplement for both my dog and cat?
Some products in this roundup are labeled for both dogs and cats, but that does not mean the same amount is right for each. Check that the label names both species and gives directions that apply to your pets. Do not calculate a cat’s serving by simply scaling down a dog’s portion without guidance. Cats may also have different food preferences, which can affect whether a liquid topper is practical. Ask your veterinarian before use if either animal has a condition, takes medication, or follows a restricted diet.
What should I compare on labels when two products both say salmon oil?
Compare the amount of EPA and DHA per serving, the recommended serving, and which species the product is intended for. “Salmon oil” identifies a source, but it does not by itself show the omega-3 amount your pet receives. Also check the full ingredient list, storage directions, and whether the label explains use by pet size. Bottle volume alone can be misleading because serving sizes vary. If a label leaves important dose information unclear, ask the manufacturer or your veterinarian before choosing it.
Is a large bottle a better choice for a multi-pet household?
A larger bottle can reduce how often you replace it when several pets use the same product and the label permits use for each species. It may be a poor fit if one pet refuses the oil or if the container will take a long time to finish after opening. Check storage instructions and use-period guidance before choosing the biggest size. Also compare the amount used per serving, since pets of different sizes may go through the bottle at different rates. For a new supplement, a smaller container can be the safer way to judge acceptance.
Should I ask a veterinarian before starting fish oil for my pet?
That is a sensible step if your pet has an ongoing health issue, takes medication, has a known sensitivity, or follows a therapeutic diet. A veterinarian can help you decide whether a supplement fits the animal’s needs and what label information matters. This is particularly useful when products list different amounts of EPA and DHA or use different serving instructions. Do not use a supplement to replace prescribed treatment or change a medication routine. For a healthy pet, follow the product label and seek professional advice if you notice an unwanted reaction.
Conclusion
For the broadest fit, I’d start with Nordic Naturals Omega-3 Pet Fish Oil as the best overall pick for its dog-and-cat positioning and manageable liquid format. For a household that already uses oil regularly, compare the larger Native Pet and Chew + Heal bottles for a more practical supply; they are the strongest value-oriented choices when the volume suits your use. If you want a more premium-leaning option, consider Fera Pets Liquid Fish Oil and inspect its label details against your priorities. Nordic Naturals soft gels are my beginner-friendly choice for owners who prefer a measured unit over pouring oil, while Petsology chews are worth a look for dogs that readily accept treats. For a specific need, choose by species directions, EPA and DHA information, and your veterinarian’s advice—not by a broad benefit claim or the biggest container.
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