Omega-3 for Dogs

Why, When, and How to Dose

Omega-3 fatty acids are critical to your dog’s overall health. They support healthy skin, joints, brain, and immune function—and they play a powerful role in reducing inflammation.

The most important omega-3s for dogs are EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid)—both found in marine sources like fish, krill, green-lipped mussels, and phytoplankton.

Dogs cannot make these fats on their own and cannot efficiently convert plant-based omega-3s (like flax or chia) into usable forms. If you are feeding lost of fresh oily fish with it’s skin, then you may require less supplementation. But you would have a hard time reaching the upper amounts suggested for chronic illness without supplementation. Evaluate the diet as a whole.

Why Omega-3s Matter

Most dogs benefit from omega-3 supplementation—especially if they eat kibble or even fresh food made with conventionally raised meat.

Omega-3s support:

  • Skin and coat health

  • Joint and mobility comfort

  • Brain and cognitive function (especially in seniors and puppies)

  • Immune balance

  • Inflammation control

  • Management of allergies, autoimmune conditions, cancer, and seizures

Dosing Omega-3 by Body Weight

Always calculate based on the combined EPA + DHA content, not the total oil amount in a capsule or pump.

Use this general guide based on milligrams per kilogram of body weight per day:

Maintenance / General Wellness
50–100 mg per kg of body weight daily

Allergies / Skin Inflammation / Arthritis
150 mg per kg daily

Chronic Disease / Autoimmune / Neurological Support
200 mg per kg daily

Cancer / Seizure Management
Up to 300 mg per kg daily

Choosing an Omega-3 Product

Look for:

  • Clearly labeled EPA + DHA per dose

  • From wild-caught small fish (like anchovy, sardine)

  • Third-party tested for purity

  • Glass packaging (not plastic) to protect against oxidation

  • No synthetic additives or preservatives

Krill oil, green-lipped mussel, or phytoplankton can be excellent choices depending on your dog’s needs and tolerances.

How to Feed It

  • Add to food daily (once or divided)

  • Use a dropper, pump, or capsule depending on the product

  • Store in the fridge

  • Rotate sources every few months

If your dog is on a low-fat diet, consider low-fat omega-3 sources like phytoplankton.

Caution: Omega-3s can thin the blood. Use caution before surgery or if your dog is taking blood-thinning medications.

What That Looks Like in Real Life

Doses are based on combined EPA + DHA, calculated in milligrams per kilogram of body weight per day (mg/kg/day). Use the dog’s weight in kilograms (1 kg = 2.2 lbs) to find the right range.

Maintenance / General Wellness

50–100 mg/kg/day

  • 10 lb dog → 225–450 mg per day

  • 25 lb dog → 565–1,130 mg per day

  • 50 lb dog → 1,130–2,260 mg per day

  • 75 lb dog → 1,700–3,400 mg per day

  • 100 lb dog → 2,260–4,520 mg per day

Allergies / Skin Inflammation / Arthritis

150 mg/kg/day

  • 10 lb dog → ~675 mg per day

  • 25 lb dog → ~1,700 mg per day

  • 50 lb dog → ~3,400 mg per day

  • 75 lb dog → ~5,100 mg per day

  • 100 lb dog → ~6,800 mg per day

Chronic Disease / Autoimmune / Neurological Support

200 mg/kg/day

  • 10 lb dog → ~900 mg per day

  • 25 lb dog → ~2,260 mg per day

  • 50 lb dog → ~4,520 mg per day

  • 75 lb dog → ~6,780 mg per day

  • 100 lb dog → ~9,040 mg per day

Cancer / Seizure Management

Up to 300 mg/kg/day

  • 10 lb dog → up to 1,350 mg per day

  • 25 lb dog → up to 3,390 mg per day

  • 50 lb dog → up to 6,780 mg per day

  • 75 lb dog → up to 10,170 mg per day

  • 100 lb dog → up to 13,560 mg per day

💡 Start on the lower end of the target range and increase slowly. Watch for soft stool—this often means you’ve gone too high or too fast.

Each dog is individual — dosing is ultimately individual.