13 Best Fish Oil Supplements for Dogs 2025

4. iHeartDogs Honey Guard™ – Allergy & Itch Omega 3-6-9 Powder for Dogs

With Honey Guard™ Allergy & Itch Omega 3-6-9 Powder, your dog can find powerful relief from itching, allergies, and skin irritation, all while boosting their immune system and overall health. This extra-strength formula combines essential omega-3, omega-6, and omega-9 fatty acids with a unique blend of Manuka honey, quercetin, colostrum, krill oil, and probiotics for maximum support. Together, these ingredients help calm itchy skin, reduce seasonal and environmental allergies, promote a shiny coat, and improve digestive balance. Unlike many dog supplements, Honey Guard™ is crafted in an easy-to-use powder you can mix right into your pup’s food, making daily wellness simple and stress-free. Plus, it’s vet-formulated and made in the USA, so you can feel confident you’re giving your dog safe, effective care. And when you buy from iHeartDogs, you’re also helping provide meals to shelter dogs in need.

Delivery method: Powder (90 scoops per container)

Serving Size: 1 scoop daily per 25 lbs. of body weight

Krill oil content per serving: 500 mg

Total Omega-3: 250 mg per scoop

DHA per serving: 60 mg per scoop

EPA per serving: 90 mg per scoop

Ingredients: Flaxseed powder, krill oil, Manuka honey, colostrum, quercetin, probiotics (Lactobacillus acidophilus, Bifidobacterium lactis), safflower oil, borage oil, sunflower lecithin, natural flavors, mixed tocopherols (preservative).

Pros

• Extra-strength formula for tough allergy and itch relief
• Combines skin, coat, digestive, and immune support in one powder
• Easy-to-mix powder for picky eaters
• Vet-formulated and made in the USA
• Every purchase feeds hungry shelter dogs
• 100% money-back guarantee

Cons

• Some dogs may take time to adjust to powdered supplements

Related: Fish Oil for dogs

5. iHeartDogs Salmon Oil for Dogs and Cats – Nourishing Skin & Coat Omega 3 Fish Oil for Dogs Supports Allergy & Itch Relief

What we love about this fish oil is the look and smell. Compared to most fish oils, which have a yellowish tone, this bright pinkish-orange salmon oil is sourced from Norwegian salmon. It’s so fresh that it has no fishy smell at all!

If your pup suffers from dry, itchy fur or low energy, this premium fish oil is all-natural and supports skin, coat, hips and joints, heart, and immunity. Salmon oil can give your dog the energy he or she needs for a happy, healthy life.

Delivery method: Liquid pump

Omega-3 content per serving: 217 mg

DHA per serving: 46 mg

EPA per serving: 31 mg

DPA per serving: 15mg

Pros

• No fishy smell
• Fresh taste that dogs love
• Contains not just DHA and EPA, but also DPA

Cons

• Not the cheapest option
• Should be stored in cooler, dark environment

6. Zesty Paws Omega Bites

Each Zesty Paws Omega Bites chew features AlaskOmega, a premium fish oil with Omega 3 fatty acids (EPA and DHA), along with vitamin C, vitamin E, and biotin (or Vitamin B7). These soft chews also contain antioxidants, providing additional free radical support for dogs. And they’re made in the USA with sustainably sourced fish oil and never any artificial preservatives, flavors, or synthetic colors.

Delivery method: Soft chew

Serving Size: 1 chew daily for up to 25 lbs.

Calories: 18 ME kcal per 4-gram chew

Omega-3 content per serving: 143 mg

DHA per serving: 25 mg

EPA per serving: 80 mg

Ingredients: Pollock Oil (AlaskOmega), Vitamin C (Ascorbic Acid), Vitamin E (d-alpha tocopherol), Zinc, Biotin, Pea Flour, Palm Fruit Oil, Garbanzo Flour, Tapioca Flour, Flaxseed Meal, Algae, Natural Chicken Flavoring, Sunflower Lecithin, Cod Liver Oil, Coconut Glycerin, Sorbic Acid (Natural Preservative), Powdered Cellulose (Coating Only)

Pros

• Made with AlaskOmega, a premium Omega-3 fatty acids blend
• Sustainably sourced
• Contains vitamin C, vitamin E, & biotin
• Reviewers report improvements in dandruff and shedding
• For dogs of all ages

Cons

• Not for picky eaters
• Dries out quickly

7. PetHonesty Wild Alaskan Salmon Oil for Dogs

PetHonesty Wild Alaskan Salmon Oil for Dogs is made from 100% natural salmon wild-caught off the coast of Alaska. And you can bet on its purity because this best fish oil supplement for dogs is made from just three ingredients and never diluted with other oils. Plus, it’s free from artificial ingredients and preservatives. Thanks to the included pump top, you can simply pump the oil over your pup’s food to give them all the benefits of fish oil.

Delivery method: Liquid

Serving Size: 1 pump (2ml) of oil per 15-25 lbs. of body weight

Calories: 41.4kcal/teaspoon

Omega-3 content per 2 pumps: 1227 mg

DHA per serving: 465 mg

EPA per serving: 423 mg

Ingredients: Alaskan Salmon Oil, EPA Omega-3, DHA Omega-3

Pros

• All natural ingredients and no preservatives
• No added wheat, corn, or sugar
• Many reviews mention improved coat conditions
• Made for all ages and sizes
• Dongs enjoy the taste
• For cats and dogs
• Made in the USA with Alaskan-caught salmon
• Veteran-owned and donates to no-kill shelters

Cons

• Reviewing parents mention fishy smell on pet’s breath

8. VetriScience Omega 3, 6, 9 Fish Oil for Dogs and Cats

VetriScience Laboratories’ Omega 3, 6, 9 gel capsules contain a blend of non-GMO oils from borage seed, flaxseed, and fish that combines the health benefits of Omega 3, 6, and 9 fatty acids. Sold in a 90-capsule quantity for an affordable price, these fish oil capsules will make your life easy when it comes to giving your dog Omega fatty acid benefits. Just wrap it in something yummy, then toss it to your pup. And if your dog has trouble swallowing large capsules, VetriScience recommends opening the gel capsule and adding the oil to your dog’s bowl at mealtime.

Delivery method: Gel capsule

Serving Size: 1 gel cap daily per 15 – 30 lbs. of body weight

DHA per capsule: 80 mg

EPA per capsule: 120 mg

Ingredients: Borage seed oil, fish oil, flaxseed oil, gelatin, glycerin, purified water

Pros

• Gluten-free
• Reviewers report less itching in dogs
• Formulated with input from veterinarians and trainers
• Affordably priced
• 100% satisfaction guarantee
• Manufactured in the USA

Cons

• Large capsules may be hard for small dogs to swallow
• Some reviewers report capsule cover feels like hard plastic

9. Pet Naturals Skin and Coat for Dogs

Avoid sticky and stinky liquids with Pet Naturals Skin and Coat Chews for Dogs while still treating your dog to the benefits of fish oil. Made from a blend of salmon oil, vitamin E, and flax oil, these chews are designed to calm irritated skin and reduce scratching. They’re formulated by a veterinarian and never contain any corn, wheat, or artificial color. And at such a low price, Pet Naturals fits any budget.

Delivery method: Soft chew

Serving Size: 1 chew per 25 lbs. of body weight daily

Calories: 8 kcal per chew

Omega-3 content per chew: 20 mg

Ingredients: oat flour, rye flour, brewers yeast, glycerin, flaxseed meal, vegetable flavor, Arabic gum, soy lecithin, safflower oil, vitamin E supplement, maltodextrin, sodium alginate, calcium sulfate, water, canola oil, dried citrus pulp, salmon oil, sorbic acid (a preservative), propionic acid (a preservative), mixed tocopherols (a preservative), citric acid (a preservative), rosemary extract, silicon dioxide, vegetable oil

Pros

• No corn, wheat, or artificial color
• Reviewers report less itching
• Inexpensive option
• Made in the USA

Cons

• Lower Omega-3 content than some competitors
• Not for picky eaters

10. Grizzly Salmon Plus Omega Fatty Acids Supplement

You’ll find nothing but fish oils in Grizzly Salmon Plus Omega Fatty Acids Supplement, and your dog will love that pure fish taste while seeing body-wide benefits. The salmon, pollock, and whitefish that make up this oil are wild-caught off the Alaskan coast, and salmon pack more fatty acids than farmed fish, so you’ll find higher Omega 3 levels in Grizzly’s salmon oil than in most competitors. And when only using one pump a day, one bottle of this best fish oil supplement will last for an estimated 270 days.

Delivery method: Liquid

Serving Size: 1 pump (3.5 ML) per 12 – 25 lbs. of bodyweight

Calories: 30 cal. per pump

Omega-3 content per teaspoon: 1285 mg

DHA per teaspoon: 460 mg

EPA per teaspoon: 600 mg

Ingredients: Wild Alaskan Salmon Oil, Wild Alaskan Pollock Oil, Alaskan Wild Whitefish Oil, tocopherols

Pros

• Great for slowing shedding
• Dogs love the taste
• Wild-caught salmon, pollock, and whitefish
• Caught and made in Alaska
• Medical-grade pump for accurate dosing

Cons

• Priced on the high side

11. Vetoquinol Triglyceride Omega Liquid Dog & Cat Supplement

Another premium choice among the best fish oils for dogs, Vetoquinol Triglyceride Omega Liquid Supplement, can be given to cats and dogs no matter their size, with dosages formulated for furry ones weighing as little as eight pounds on up to the big dogs that tip scales at one hundred pounds. This vet-recommended fish oil exists in its natural triglyceride form, which is more bio-available than other forms. And if your pup is picky about fishy tastes, you can find this same formula in capsule form.

Delivery method: Liquid

Serving Size: One pump (1 ML) per 20 – 39 lbs.

Calories: 8.5kcal/ML

Fish oil content per pump: 1,000 mg

DHA per serving: 120 mg

EPA per serving: 180 mg

Ingredients: Fish Oil, dl-alpha-Tocopherol (source of Vitamin E), Vitamin A Palmitate, Vitamin D3 Supplement

Pros

• No mercury, lead, or PCBs
• Vet recommended
• Triglyceride (TG) form fish oil for optimal uptake
• Liquid form ensures full dose is received
• Pump included

Cons

• May cause fishy breath

12. Nulo Functional Omega Dog Supplement

Nulo Functional Omega Dog Supplements are crafted with a variety of functional ingredients, including their Marine Fish Oil, a blend of sardine, herring, mackerel, and anchovy. Coconut oil, dried kelp, and organic turmeric round out the healing ingredients, all working together to deliver beneficial Omega-3, -6, & -9 fatty acids for skin and coat health, a strong immune system, and cognitive prowess. And these tasty fish oil chews keep it natural by excluding corn, wheat gluten, soy, artificial preservatives, colors, and fake flavoring from their recipes. Nulo products are developed in collaboration with veterinarians, animal nutritionists, and companion animal dermatology specialists.

Delivery method: Soft chew

Serving Size: 1 chew daily for up to 25 lbs.

Calories: 25 kcal/2 chews

Omega-3 content per 2 chews: 155 mg

DHA per 2 chews: 50 mg

EPA per 2 chews: 80 mg

Ingredients: Chickpea Flour, Brewers Dried Yeast, Sunflower Lecithin, Vegetable Glycerin, Water, Fish Oil, Safflower Oil, Organic Honey, Gelatin, Coconut Oil, Dried Kelp, Dried Bacillus coagulans Fermentation Product, Natural Flavor, Ascorbic Acid (Vitamin C), Biotin (Vitamin B7), d-Alpha Tocopherol Acetate (Vitamin E), Organic Turmeric

Pros

• Contains Omega-3, -6, & -9 combination for overall health
• Made with chickpea flour for food sensitivities
• Developed by veterinarians and animal nutritionists
• No fishy breath
• Chews can be added to dog food
• May help with your dog’s seasonal allergies
• Not a single one-star review on Amazon; all ratings two stars and above
• Manufactured in the USA

Cons

• No mention of taste by reviewers

Related: The Best Salmon Oils for Dogs

13. Native Pet Omega Oil for Dogs

Native Pet Omega Oil for Dogs is made with only five ingredients, including wild-caught salmon and pollock oil, wheat germ oil, and biotin, delivering an optimal blend of EPA, DHA, and vitamin E. It’s also free of additives and preservatives for a clean dose of fish oil delight for your dog! To serve, simply pump the recommended dosage for your dog’s weight over their food to provide relief from joint pain, skin irritation, and itching. This high-quality omega oil is clean-label, vet-developed, wild-caught, and made in the USA.

Delivery method: Liquid

Serving Size: 1 pump per 10 lbs.

Calories: 17 calories per pump

Omega-3, 6, 9 content per serving: 920 mg/1 tsp

Ingredients list: Wild-caught pollock, salmon oil, wheat germ oil, biotin, and natural tocopherol

Pros

• Easy-to-use pump delivery
• Wild-sourced salmon and pollock oil
• Contains wheat-free wheat germ
• Also provides vitamin B7 (biotin)
• Picky eaters love the taste
• Designed by leading vet nutritionists
• 100% customer satisfaction guarantee

Cons

• Reviewing dog parents mention a strong fishy smell