How much fish oil should I give my dog?
Give a 50 lb dog about 1,560 mg of EPA + DHA a day (69 mg per kg), the dose a 2016 arthritis trial used. The cheapest way to get there is Deley Naturals Fish Oil: about 1.1 teaspoons a day for $0.27. Count EPA + DHA on the label, not "fish oil".
Best for most dogs
Deley Naturals Fish Oil (Icelandic wild-caught, 32 oz)
1,370 mg EPA + DHA per tsp1.1 a day for a 50 lb dog$0.27 a day to reach the full dose1
Best capsule, for dogs who won't eat oil
Pet Health Solutions Omega-Caps HP Fish Oil
890 mg EPA + DHA per capsule1.8 a day for a 50 lb dog$0.49 a day to reach the full dose2
Best with the NASC seal
Wonder Paws Omega Max 3x Fish Oil (Alaskan salmon, cod liver, pollock, krill)
828 mg EPA + DHA per tsp1.9 a day for a 50 lb dog$0.36 a day to reach the full dose3
We pick by cost a day to reach 1,560 mg of EPA + DHA for a 50 lb dog. Prices on Amazon, October 28, 2026.4, 5
How much EPA + DHA by weight
The amount that matters is EPA + DHA, the two omega-3s in fish oil, not the total fish oil on the front of the bottle. The label's guaranteed analysis or supplement facts lists EPA and DHA in mg; add them.
In a 2016 trial, 74 dogs with arthritis got about 69 mg of EPA + DHA per kg a day for 84 days. They showed less discomfort and lameness than dogs given a placebo.5 Vets use 50 to 220 mg per kg, with the highest doses for arthritis.6
Don't go over the safe upper limit: 280 mg of EPA + DHA per 100 calories your dog eats, set by the National Research Council.6, 7 Too much can cause stomach upset, weight gain and slower blood clotting, so ask your vet first if your dog takes an NSAID or is healing from a wound.6
| Dog's weight | Trial dose | Range vets use | Safe upper limit |
|---|---|---|---|
| 10 lb (5 kg) | 310 mg | 230 mg to 970 mg | 970 mg |
| 25 lb (11 kg) | 780 mg | 570 mg to 1,940 mg | 1,940 mg |
| 50 lb (23 kg) | 1,560 mg | 1,130 mg to 3,260 mg | 3,260 mg |
| 75 lb (34 kg) | 2,350 mg | 1,700 mg to 4,420 mg | 4,420 mg |
| 100 lb (45 kg) | 3,130 mg | 2,270 mg to 5,480 mg | 5,480 mg |
Fish oil calculator
Type your dog's weight. You get the trial dose, the safe upper limit, and how many servings of each product it takes, with the cost per day.
Every fish oil: cost a day to reach the dose
Each product's own dose for a 50 lb dog, as a share of the trial dose (1,560 mg), and what it costs a day to reach the trial dose with it. Cheapest first.
Label dose = the servings the label says to give a 50 lb dog, times the EPA + DHA in each. Trial dose costs = the servings it takes to reach 1,560 mg a day, at the Amazon price read October 28, 2026.
| Product | EPA + DHA per serving | Label dose, 50 lb | Trial dose costs |
|---|---|---|---|
| Deley Naturals Fish Oil (Icelandic wild-caught, 32 oz) | 1,370 mg per tsp | 1,370 mg (88% of trial dose) | $0.27 a day |
| Wonder Paws Omega Max 3x Fish Oil (Alaskan salmon, cod liver, pollock, krill) | 828 mg per tsp | 1,656 mg (106% of trial dose) | $0.36 a day |
| Wonder Paws Superhero Norwegian Salmon Oil (128 oz) | 276 mg per tsp | 828 mg (53% of trial dose) | $0.41 a day |
| Nutramax Welactin Omega-3 Fish Oil, liquid | 1,330 mg per scoop | 1,995 mg (127% of trial dose) | $0.45 a day |
| Pet Health Solutions Omega-Caps HP Fish Oil | 890 mg per capsule | 445 mg (28% of trial dose) | $0.49 a day |
| Vetoquinol Triglyceride OMEGA Liquid and cats (8 oz) | 300 mg per pump | 600 mg (38% of trial dose) | $0.50 a day |
| Pet Health Solutions Omega-Caps ES Extra Strength Fish Oil for large and giant dogs (250 softgels) | 600 mg per capsule | no dose by weight | $0.57 a day |
| Salveo Petcare Omega 3 Wild Fish Oil Softgels | 300 mg per capsule | 600 mg (38% of trial dose) | $0.72 a day |
| Nutri-Vet Fish Oil Softgels | 300 mg per capsule | 300 mg (19% of trial dose) | $0.95 a day |
| Vetoquinol Triglyceride OMEGA capsules for Large Dogs | 600 mg per capsule | no dose by weight | $1.04 a day |
| Wonder Paws Superhero Norwegian Salmon Oil (8 oz) | 276 mg per tsp | 828 mg (53% of trial dose) | $1.18 a day |
| Nordic Naturals Omega-3 Pet (soft gels) | 255 mg per capsule | 765 mg (49% of trial dose) | $1.22 a day |
| Nutramax Welactin Omega-3 Softgel Capsules | 255 mg per capsule | 638 mg (41% of trial dose) | $1.28 a day |
| Vebelkang Krill Oil Omega 3 Softgels | 115 mg per capsule | 230 mg (15% of trial dose) | $1.89 a day |
| TTLXRL Omega 3 Fish Oil Salmon Chews | 62 mg per chew | 188 mg (12% of trial dose) | $2.00 a day |
| WizardPet Wild Alaskan Salmon & Krill Oil Omega Chews, 120 ct | 178 mg per chew | 355 mg (23% of trial dose) | $2.20 a day |
| Nature Target Allergy & Itch Relief Advanced Immune Chews | 83 mg per chew | 166 mg (11% of trial dose) | $2.83 a day |
| PENPEN PEN PEN Allergy & Itch Soft Chews | 62 mg per chew | 188 mg (12% of trial dose) | $3.06 a day |
| Natural Dog Company Skin & Coat Omega Chews | 84 mg per chew | 168 mg (11% of trial dose) | $6.20 a day |
| Chew + Heal Labs + Heal Omega Skin + Coat Soft Chews | 28 mg per chew | 113 mg (7% of trial dose) | $8.02 a day |
| Bark&Spark Fish Oil Omega-3 Skin & Coat Salmon Oil Soft Chews | 26 mg per chew | no dose by weight | $8.45 a day |
| VetIQ Allergy Pro+ Chews, Seasonal Support (hickory smoke) | 25 mg per chew | no dose by weight | $12.46 a day |
| VetIQ Skin & Coat Soft Chews | 24 mg per chew | no dose by weight | $13.28 a day |
| Bark&Spark Allergy Relief Chews - Omega-3 / Fish Oil Itchy Skin Relief | 18 mg per chew | 70 mg (4% of trial dose) | $19.36 a day |
Source: Each brand's label; Amazon prices read October 28, 20264, 5
Want the most EPA + DHA per dollar? Pick a liquid oil. Deley Naturals Fish Oil reaches the trial dose for $0.27 a day. If your dog only takes chews, TTLXRL Omega 3 Fish Oil Salmon Chews is the lowest-cost chew here at $2.00 a day.
Questions people ask
- How much fish oil should I give my dog?
- Aim for EPA + DHA, not "fish oil". A 2016 trial in dogs with arthritis used about 69 mg of EPA + DHA per kg a day: about 1,560 mg for a 50 lb dog. Stay under the safe upper limit of 280 mg per 100 calories your dog eats.
- What is the cheapest fish oil for dogs per day?
- Deley Naturals Fish Oil reaches the 1,560 mg trial dose for a 50 lb dog for $0.27 a day, the lowest of the 24 products on this page.
- Is salmon oil the same as fish oil for dogs?
- Salmon oil is one kind of fish oil. What matters is the EPA + DHA per serving on the label, not the fish it came from.
- How much fish oil is too much for a dog?
- Stay under the safe upper limit in the table above: 3,260 mg a day for a 50 lb dog.
- Liquid fish oil or capsules for dogs?
- A liquid oil gets a 50 lb dog to 1,560 mg in about 1.1 teaspoons. Capsules are easier to give; Pet Health Solutions Omega-Caps HP Fish Oil is the lowest-cost capsule here at $0.49 a day.
- Should I give fish oil with food?
- Most labels say to give it with a meal. Start with a smaller amount and build up over a week or two to avoid an upset stomach.
Notes and sources
- EPA + DHA per serving and the dose by weight come from each brand's label, read October 2026. See how we do the math.
- Only listings sold by Amazon.com or the brand; the NASC Quality Seal is from NASC's own member list.
- Product photos come from Amazon.
- Prices checked on Amazon October 28, 2026. Published .
Sources
- Deley Naturals label: Fish Oil (Icelandic wild-caught, 32 oz), read October 2026.
- Pet Health Solutions label: Omega-Caps HP Fish Oil, read October 2026.
- Wonder Paws label: Omega Max 3x Fish Oil (Alaskan salmon, cod liver, pollock, krill), read October 2026.
- Prices: Amazon product data, read October 28, 2026. Cost per serving = listing price divided by the servings in the container.
- Mehler SJ et al., "A prospective, randomized, double blind, placebo-controlled evaluation of the effects of eicosapentaenoic acid and docosahexaenoic acid on the clinical signs and erythrocyte membrane polyunsaturated fatty acid concentrations in dogs with osteoarthritis," Prostaglandins Leukot Essent Fatty Acids, 2016 (PMID 27269707).
- Raditic D, Gaylord L, "Fish Oil Dosing in Pet Diets and Supplements," Today's Veterinary Practice, May/June 2020 (therapeutic range 50 to 220 mg/kg; NRC safe upper limit 280 mg EPA + DHA per 100 kcal), read October 28, 2026.
- Merck Veterinary Manual, "Nutritional Requirements of Small Animals" (resting energy = 70 x kg to the 0.75; neutered adult dog = 1.6 x that), read October 28, 2026.
Labels for the products in the tables
- Bark&Spark: Allergy Relief Chews - Omega-3 / Fish Oil Itchy Skin Relief, Fish Oil Omega-3 Skin & Coat Salmon Oil Soft Chews.
- Chew + Heal Labs: + Heal Omega Skin + Coat Soft Chews.
- Deley Naturals: Fish Oil (Icelandic wild-caught, 32 oz).
- Natural Dog Company: Skin & Coat Omega Chews.
- Nature Target: Allergy & Itch Relief Advanced Immune Chews.
- Nordic Naturals: Omega-3 Pet (soft gels).
- Nutramax: Welactin Omega-3 Fish Oil, liquid, Welactin Omega-3 Softgel Capsules.
- Nutri-Vet: Fish Oil Softgels.
- PENPEN: PEN PEN Allergy & Itch Soft Chews.
- Pet Health Solutions: Omega-Caps ES Extra Strength Fish Oil for large and giant dogs (250 softgels), Omega-Caps HP Fish Oil.
- Salveo Petcare: Omega 3 Wild Fish Oil Softgels.
- TTLXRL: Omega 3 Fish Oil Salmon Chews.
- Vebelkang: Krill Oil Omega 3 Softgels.
- VetIQ: Allergy Pro+ Chews, Seasonal Support (hickory smoke), Skin & Coat Soft Chews.
- Vetoquinol: Triglyceride OMEGA Liquid and cats (8 oz), Triglyceride OMEGA capsules for Large Dogs.
- WizardPet: Wild Alaskan Salmon & Krill Oil Omega Chews, 120 ct.
- Wonder Paws: Omega Max 3x Fish Oil (Alaskan salmon, cod liver, pollock, krill), Superhero Norwegian Salmon Oil (128 oz), Superhero Norwegian Salmon Oil (8 oz).