Omega-3 fatty acids, commonly called fish oils, are healthy fats that help reduce inflammation throughout the body. Pets cannot efficiently make the most beneficial omega-3’s — EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) — on their own, so they must get them from their diet or supplements. Marine sources such as fish, krill, green-lipped mussel, and algae provide these active forms more effectively than plant sources like flaxseed.
Once absorbed, omega-3’s become part of your pet’s cells and help the body produce substances that calm inflammation rather than promote it. Because inflammation plays a role in many chronic conditions, omega-3’s supplementation may help improve comfort, mobility, and overall quality of life.
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Common Benefits of Omega-3 Fatty Acids
Omega-3 fatty acids may be helpful for pets with:
- Joint disease & arthritis — improved mobility, less stiffness and discomfort
- Skin & allergy conditions — reduced itching, healthier skin and coat
- Kidney disease — support for inflammation control and protein loss
- Heart health — support of certain cardiac conditions
- Digestive disorders — help manage inflammation in the GI tract
- Brain & neurologic health — support for aging cognition, behavior, and seizure management
Some veterinary diets contain omega-3’s, but additional supplementation is often needed to reach therapeutic levels.
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Why Marine Sources Matter
Plant sources of omega-3s mainly provide ALA (alphalinolenic acid), which pets convert very poorly to EPA and DHA. Marine-based omega-3s deliver the forms that are most biologically active and clinically beneficial.
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Veterinary Guidance Recommended
Omega-3 dosing is individualized, and recommendations may vary among veterinarians based on your pet’s specific needs. Always follow your veterinarian’s guidance to ensure safe and effective use.
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EPA + DHA Dosing Chart for Dogs
For dogs with osteoarthritis, a commonly recommended therapeutic dose is 100 mg/kg per day of combined EPA + DHA.
However, many dogs tolerate omega-3s best if the dose is gradually increased over several weeks.
I often start patients lower and increase every 2–3 weeks.
Below is a simplified dosing guide.
| Dog Weight | 25% Dose | 50% Dose | 75% Dose | Full Dose (100 mg/kg EPA+DHA) |
|---|---|---|---|---|
| 10 lb (4.5 kg) | 110 mg | 225 mg | 335 mg | 450 mg |
| 20 lb (9 kg) | 225 mg | 450 mg | 675 mg | 900 mg |
| 30 lb (13.6 kg) | 340 mg | 680 mg | 1020 mg | 1360 mg |
| 40 lb (18 kg) | 450 mg | 900 mg | 1350 mg | 1800 mg |
| 50 lb (22.7 kg) | 570 mg | 1135 mg | 1700 mg | 2270 mg |
| 60 lb (27 kg) | 680 mg | 1365 mg | 2045 mg | 2730 mg |
| 70 lb (31.8 kg) | 795 mg | 1590 mg | 2385 mg | 3180 mg |
| 80 lb (36 kg) | 910 mg | 1820 mg | 2730 mg | 3640 mg |
| 90 lb (41 kg) | 1025 mg | 2050 mg | 3075 mg | 4100 mg |
| 100 lb (45 kg) | 1140 mg | 2275 mg | 3410 mg | 4550 mg |
These full-dose numbers are consistent with dosing guidelines published by the Canine Arthritis Resources and Education (CARE) organization.
