Salmon Oil or Fish Oil for Dogs. Are they beneficial?

Last updated: April 2026

Yes — both salmon oil and fish oil are beneficial for dogs. Both are rich in Omega-3 fatty acids (EPA and DHA) that dogs can't produce on their own, supporting healthy skin, coat, joints, heart, and brain. The key difference is source and purity: salmon oil comes specifically from wild-caught salmon, making it one of the cleanest and most concentrated Omega-3 sources available. Fish oil is a broader term that can include sardine, cod, krill, or farmed fish with more variability in quality.

If you're choosing between the two, wild-caught salmon oil is the better pick for most dogs.

Key Takeaways

• Dogs need Omega-3 fatty acids from an external source because their bodies can't make them
• Both fish oil and salmon oil provide EPA and DHA, but salmon oil from wild-caught Alaskan salmon offers superior purity
  
• Benefits include healthier skin and coat, reduced inflammation, better joint mobility, heart support, and cognitive function
  
• The recommended dosage is 75–100 mg of combined EPA/DHA per kg of body weight daily
  
• Always choose a triglyceride-form oil over ethyl ester for better absorption
  

What Is Fish Oil for Dogs?

Fish oil is a dietary supplement made from the fatty tissue of fish. It's one of the most well-researched supplements for dogs because it delivers Omega-3 fatty acids, specifically EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), that are essential for nearly every system in your dog's body.

Dogs (and cats) cannot produce Omega-3s on their own. Most commercial dog foods are high in Omega-6 fatty acids from corn-fed meat and refined oils, which can cause an imbalance that contributes to inflammation. Fish oil supplements help restore that balance.

"Fish oil" can come from many sources: sardines, anchovies, cod, krill, or salmon. Quality varies significantly depending on the source, how it's processed, and whether it's wild-caught or farmed.

What Is Salmon Oil and How Is It Different?

Salmon oil is a specific type of fish oil made exclusively from salmon. When it comes from wild-caught Alaskan salmon, it offers:

• Higher Omega-3 concentration compared to many generic fish oils
  
• Cleaner sourcing because wild salmon from cold, clean waters have lower contaminant exposure than farmed fish
  
• Triglyceride form so it retains its natural structure and is absorbed more efficiently by your dog's body than processed ethyl ester fish oils
  
• Sustainability so look for MSC-certified salmon oil to ensure responsible fishing practices
  

Vital Pet Life's Wild Alaskan Salmon Oil is MSC-certified, triglyceride-form, and verified by ORIVO's NMR lab testing for species and geographic origin, meaning you know exactly what's in the bottle.

Health Benefits of Salmon Oil and Fish Oil for Dogs

Healthier Skin and Coat

Omega-3 fatty acids have powerful anti-inflammatory properties that address the root cause of itchy, dry, and flaky skin. Dogs prone to allergies, dermatitis, or excessive shedding often see noticeable improvement within weeks. The result is a softer, shinier coat and less scratching.

👉 Related: Side Effects of Salmon Oil for Dogs: Benefits and Risks

Reduced Inflammation and Joint Support

Omega-3s help suppress the body's inflammatory response, which is especially important for aging dogs or breeds prone to arthritis and hip dysplasia. Fish oil can reduce joint inflammation, improve mobility, and make daily movement more comfortable. Pair it with a joint supplement like Vital Pet Life Mobility Powder for added support.

Heart Health

Salmon oil helps lower triglyceride levels in the blood and raise HDL ("good") cholesterol. High triglycerides are a risk factor for heart disease in dogs, particularly in older or overweight pets. Omega-3s also help relax blood vessels, improving blood flow and reducing blood pressure.

Brain and Cognitive Function

DHA is critical for brain development in puppies and helps maintain cognitive function in senior dogs. Research suggests that adequate DHA intake reduces the risk of cognitive dysfunction, the canine equivalent of dementia, and supports memory and learning.

Kidney Support

Studies have found that Omega-3 supplementation can slow the progression of kidney disease by reducing inflammation, lowering blood pressure, and decreasing protein loss in urine. Cats with kidney disease given Omega-3s lived significantly longer than those without supplementation.

Immune System Boost

Regular Omega-3 supplementation strengthens your dog's immune response, helping them fight off infections and recover faster from illness.

How Much Salmon Oil Should You Give Your Dog?

The general guideline is 75–100 mg of combined EPA and DHA per kilogram of body weight per day. Most salmon oil products include a dosing chart on the label based on your dog's weight.

A few tips:

• Start with a smaller dose and increase gradually over 1–2 weeks to avoid digestive upset

• Drizzle over your dog's regular food because most dogs love the taste

• Store in a cool, dark place and refrigerate after opening to prevent oxidation

• Always consult your vet if your dog is on medication, especially blood thinners, as Omega-3s have mild blood-thinning effects

👉 Related: How Much Salmon Oil Is Too Much for Dogs?

How to Choose the Best Salmon Oil for Your Dog

Not all salmon oils are equal. When shopping, look for:

✅ Wild-caught (not farmed) for higher Omega-3 content and cleaner sourcing

✅ Triglyceride form for better absorption than ethyl ester

✅ MSC certification to confirm sustainable fishing practices

✅ Third-party testing for species and origin verification (like ORIVO NMR testing)

✅ No additives or preservatives for pure oil only

👉 Shop Vital Pet Life Wild Alaskan Salmon Oil

Frequently Asked Questions

Is salmon oil better than regular fish oil for dogs? For most dogs, yes. Wild-caught salmon oil is a purer, more concentrated source of Omega-3s compared to generic fish oil blends. It also tends to come in triglyceride form, which is more bioavailable, meaning your dog's body absorbs and uses it more efficiently.

Can I give my dog human fish oil capsules? You can, but it's not ideal. Human fish oil capsules are often in ethyl ester form and may contain additives. A fish oil designed specifically for pets will be better calibrated for their size and needs. The recommended dose is 75–100 mg/kg of total EPA/DHA, so always check the label.

How long does it take to see results from salmon oil? Most pet owners notice improvements in skin and coat within 4–8 weeks of consistent daily supplementation. Joint mobility and immune benefits may take a little longer to become visible.

Is salmon oil safe for cats too? Yes. Cats also cannot produce Omega-3 fatty acids on their own and benefit from salmon oil supplementation. Use a product labeled safe for cats and adjust the dosage for their smaller body weight.

Does salmon oil need to be refrigerated? Yes, after opening. Omega-3 fatty acids are sensitive to heat, light, and air. Refrigerating an open bottle prevents the oil from going rancid and preserves its potency. Always seal the cap tightly.

Can too much salmon oil harm my dog? Excessive Omega-3 intake can cause loose stools, weight gain, or blood-thinning effects. Stick to the recommended dosage on the label and consult your vet if your dog has any existing health conditions.

👉 Related: How to Properly Store Salmon Oil for Dogs

Have questions about which Vital Pet Life supplement is right for your dog? Take our free pet health quiz