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Best skin and coat supplement for dogs

For skin and coat, Deley Naturals Fish Oil: ⅓ teaspoon to 1⅓ teaspoons a day gives a 50 lb dog 500 mg to 1,930 mg of EPA + DHA, the amounts skin trials used, for $0.09 to $0.34 a day. Give it two months. For a dog that won't take oil, Pet Health Solutions Omega-Caps HP Fish Oil costs $0.16 to $0.61 a day.

By Winslow Pet Health editors · Published · Numbers from each brand's own labels

Deley Naturals Fish Oil (Icelandic wild-caught, 32 oz)

Best for most dogs

Deley Naturals Fish Oil (Icelandic wild-caught, 32 oz)

1,370 mg EPA + DHA per tsp⅓ to 1⅓ tsp a day$0.09 to $0.34 a day1

$45.99 on Amazon
Pet Health Solutions Omega-Caps HP Fish Oil

Best capsule

Pet Health Solutions Omega-Caps HP Fish Oil

890 mg EPA + DHA per capsule1 to 2 capsules a day$0.16 to $0.61 a day2

$69.99 on Amazon
Wonder Paws Omega Max 3x Fish Oil (Alaskan salmon, cod liver, pollock, krill)

Best with the NASC seal

Wonder Paws Omega Max 3x Fish Oil (Alaskan salmon, cod liver, pollock, krill)

828 mg EPA + DHA per tsp⅔ to 2⅓ tsp a day$0.12 to $0.45 a day3

$36.95 on Amazon

We pick by cost a day for a 50 lb dog across the EPA + DHA amounts skin trials used. Prices on Amazon, October 28, 2026.4

An Irish setter with a glossy red coat in front of a blue wall

Fish oil for skin, 50 lb dog

EPA + DHA a day

Amounts trials used22 to 85 mg per kg500 mg to 1,930 mg
Time before you judge itvet guidelines2 months
Safe upper limit280 mg per 100 calories3,260 mg

Trials: Abba 2005 and Mueller 2004. Dose by weight for any dog: fish oil dose page.

What the research says

In a 2004 trial, 29 itchy dogs on fish oil (85 mg EPA + DHA per kg a day) had better skin scores after 10 weeks; the placebo group did not.5 A 2005 study used 22 mg per kg for 2 months.6 Vet guidelines say fatty acids, especially omega-6, can improve the gloss of a dull coat.7

Skin oils and capsules compared

What it takes to give a 50 lb dog 500 mg to 1,930 mg of EPA + DHA a day, the amounts the two skin trials used. Stronger oils give the same EPA + DHA with fewer calories; calories are shown as a share of a 50 lb dog's day (1,164 kcal).8 Stay under 280 mg of EPA + DHA per 100 calories your dog eats, about 3,260 mg a day for a 50 lb dog.9 Cheapest first.

Amount a day = servings to reach 500 mg and 1,930 mg of EPA + DHA, from the label's EPA + DHA per serving (label minimums). Also on the label = other skin and coat nutrients as printed. Cost a day = those servings at the Amazon price read October 28, 2026. NASC seal is held by the maker, from NASC's member list.

ProductAmount a dayCalories at the top amountAlso on the label, per servingMaker has NASC sealCost a day
Deley Naturals Fish Oil (Icelandic wild-caught, 32 oz) (1,370 mg EPA + DHA per tsp)⅓ to 1⅓ tsp58 kcal (5% of the day)omega-6 7% (as printed)No$0.09 to $0.34 a day
Wonder Paws Omega Max 3x Fish Oil (Alaskan salmon, cod liver, pollock, krill) (828 mg EPA + DHA per tsp)⅔ to 2⅓ tsp96 kcal (8% of the day)total omegas 1,270 mgYes$0.12 to $0.45 a day
Wonder Paws Superhero Norwegian Salmon Oil (128 oz) (276 mg EPA + DHA per tsp)1¾ to 7 tsp286 kcal (25% of the day)nothing else printedYes$0.13 to $0.50 a day
Nutramax Welactin Omega-3 Fish Oil, liquid (1,330 mg EPA + DHA per scoop)⅓ to 1½ scoopsnot on the labelnothing else printedNo$0.14 to $0.55 a day
Pet Health Solutions Omega-Caps HP Fish Oil (890 mg EPA + DHA per capsule)1 to 2 capsulesnot on the labelomega-6 33 mg, vitamin E 4 IUYes$0.16 to $0.61 a day
Vetoquinol Triglyceride OMEGA Liquid and cats (8 oz) (300 mg EPA + DHA per pump)1⅔ to 6½ pumpsnot on the labelvitamin E 2 IUYes$0.16 to $0.61 a day
Pet Health Solutions Omega-Caps ES Extra Strength Fish Oil for large and giant dogs (250 softgels) (600 mg EPA + DHA per capsule)1 to 3 capsulesnot on the labelomega-6 33 mg, vitamin E 4 IUYes$0.18 to $0.71 a day
Salveo Petcare Omega 3 Wild Fish Oil Softgels (300 mg EPA + DHA per capsule)2 to 6 capsulesnot on the labelnothing else printedNo$0.23 to $0.89 a day
Nutri-Vet Fish Oil Softgels (300 mg EPA + DHA per capsule)2 to 6 capsules61 kcal (5% of the day)vitamin E 4 IUYes$0.30 to $1.17 a day
Vetoquinol Triglyceride OMEGA capsules for Large Dogs (600 mg EPA + DHA per capsule)1 to 3 capsules55 kcal (5% of the day)vitamin E 3 IUYes$0.33 to $1.28 a day
Nordic Naturals Omega-3 Pet (soft gels) (255 mg EPA + DHA per capsule)2 to 8 capsules76 kcal (6% of the day)nothing else printedYes$0.39 to $1.50 a day
Nutramax Welactin Omega-3 Softgel Capsules (255 mg EPA + DHA per capsule)2 to 8 capsulesnot on the labelnothing else printedNo$0.41 to $1.57 a day

Source: Each brand's label; Amazon prices read October 28, 20264

Prefer a chew? The strongest skin chew we found gives 355 mg of EPA + DHA a day for a 50 lb dog; see best fish oil for dogs for more. Looking for an itch chew? See best allergy chews for dogs.

Questions people ask

What is the best supplement for dog itchy skin?
Fish oil, counted as EPA + DHA. Skin trials used 500 mg to 1,930 mg a day for a 50 lb dog; Deley Naturals Fish Oil gives that for $0.09 to $0.34 a day.
What is the best fish oil for dogs with itchy skin?
A strong one, so your dog gets the EPA + DHA without much oil. For a 50 lb dog, Deley Naturals Fish Oil costs $0.09 to $0.34 a day across the trial amounts, at ⅓ teaspoon to 1⅓ teaspoons.
What is the best vitamin for dog dry itchy skin?
Vitamin E: in one small trial, dogs on an antihistamine plus vitamin E improved more than dogs on the antihistamine alone.7 Pet Health Solutions Omega-Caps HP Fish Oil adds 4 IU of vitamin E per capsule, shown in the table above.
How long does fish oil take to help a dog's skin?
The vet guidelines say any benefit may not show before two months. The 2004 trial ran for 10 weeks.
Do allergy chews work for itchy dogs?
Most popular allergy chews are colostrum and probiotics. For the most EPA + DHA, pick a fish oil; for chews, see best allergy chews for dogs.

If your dog is very itchy, have your vet check for fleas, infection and food allergy.

Notes and sources

  • EPA + DHA per serving, calories and the other nutrients come from each brand's label, read October 2026. See how we do the math.
  • Product photos come from Amazon.
  • Prices checked on Amazon October 28, 2026. Published .

Sources

  1. Deley Naturals label: Fish Oil (Icelandic wild-caught, 32 oz), read October 2026.
  2. Pet Health Solutions label: Omega-Caps HP Fish Oil, read October 2026.
  3. Wonder Paws label: Omega Max 3x Fish Oil (Alaskan salmon, cod liver, pollock, krill), read October 2026.
  4. Prices: Amazon product data, read October 28, 2026. Cost per serving = listing price divided by the servings in the container.
  5. Mueller RS, Fieseler KV, Fettman MJ et al., "Effect of omega-3 fatty acids on canine atopic dermatitis," Journal of Small Animal Practice, 2004 (PMID 15206474) (29 dogs in three groups, 10 weeks: EPA 50 mg/kg + DHA 35 mg/kg a day, flax oil, or mineral oil placebo), abstract read October 28, 2026.
  6. Abba C, Mussa PP, Vercelli A, Raviri G, "Essential fatty acids supplementation in different-stage atopic dogs fed on a controlled diet," Journal of Animal Physiology and Animal Nutrition, 2005 (PMID 15787996) (22 dogs, 2 months, no placebo group), abstract read October 28, 2026.
  7. Olivry T et al., "Treatment of canine atopic dermatitis: 2015 updated guidelines from the International Committee on Allergic Diseases of Animals (ICADA)," BMC Veterinary Research, 2015 (no fatty acid dose is given), read October 28, 2026.
  8. 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.
  9. Raditic D, Gaylord L, "Fish Oil Dosing in Pet Diets and Supplements," Today's Veterinary Practice, May/June 2020 (range 50 to 220 mg/kg; NRC safe upper limit 280 mg EPA + DHA per 100 kcal), read October 28, 2026.

Labels for the products in the tables