Fish Oil Dosage Chart for Dogs: How Much Omega-3 Should I Feed My Dog?

Fish oil for dogs is one of the most trusted supplements for dogs, backed by research and clinical use. But the most common question is: how much do I actually give to my dog?

This guide gives you a clear fish oil dosage chart for dogs, explains how to calculate the right dose for your dog's weight, and walks you through introducing fish oil if your dog is new to it.

 

Why Fish Oil Is Recommended for Dogs

Fish oil provides two essential Omega 3 fats that dogs cannot produce on their own and most commercial kibble doesn't supply in adequate amounts:

• EPA (Eicosapentaenoic Acid): Supports anti-inflammatory functions, joint health, and skin
• DHA (Docosahexaenoic Acid): Important for brain function and eye health

Together, they reduce skin inflammation, strengthen the hair follicle, support joint mobility, and improve coat quality. Results are typically visible in 4–6 weeks of daily use.

 

How to Calculate Fish Oil Dosage for Dogs

When calculating the exact fish oil dosage for dogs, do not use the total volume of oil (e.g., 1000 mg capsule), but the combined EPA + DHA content per serving. Different fish oils have very different concentrations.

Fish oil dosages for dogs are typically calculated based on the dog’s body weight.

1) Maintenance Dose (General Health Support)

For healthy dogs, the maintenance dose is 25-30 mg of EPA + DHA per kg of body weight per day

This dosage helps maintain healthy skin, coat, joints, and prevents Omega-3 deficiency.

2) Therapeutic Dose (Medical Conditions)

For dogs with inflammatory conditions (osteoarthritis, skin allergies, kidney or heart issues), the therapeutic dosage is adjusted to approximately 75 mg EPA + DHA per kg of body weight per day.

This elevated dose can help reduce inflammation and provide targeted relief, but should only be given under veterinary or pet nutritionist supervision. Do not self-dose for medical conditions.

 

Fish Oil Dosage Chart for Dogs

Using Honst 30% Omega 3 Sardine Fish Oil as the reference (minimum 33% total Omega 3, EPA 18% + DHA 12% per ml):

Example calculation:

While calculating a maintenance dosage for a dog weighing 30 kg, we use the formula:

Dog’s weight (kg) × Target mg/kg = Daily mg of EPA + DHA

30 X 30 = 900mg of EPA + DHA/day

Now let’s say your fish oil bottle contains 50 mg EPA + 40 mg DHA. That amounts to 90 mg of EPA + DHA per ml.

900 mg required ÷ 90 mg per ml = ~10 ml/per day.

Thus, a 30kg dog will require ~ 10 ml of fish oil per day, depending on the fish oil composition.

 

How to Introduce Fish Oil to Dogs

For dogs new to fish oil or switching from another brand, start at half the calculated dose for the first 7 days to let your dog's digestive system adjust — especially important for sensitive stomachs. Then move to the full dose from week 2 onwards.

 

How to Use Fish Oil for Dogs: 5 Things to Keep in Mind

• Pour over kibble or treats, or mix into wet food.
• Do not heat or cook with fish oil.
• Always mix with food that is lukewarm or room temperature.
• Give with the largest meal of the day.
• For very fussy dogs: start with just a few drops on a lick mat and build up gradually.
• Store in the fridge after opening to prevent rancidity — discard if it smells sour.

 

TLDR for Pet Parents

Always calculate the appropriate fish oil dosage for your dog based on the EPA + DHA content of the oil, not the total oil content. To calculate fish oil dosage for your dog:

• Check your dog’s weight.
• Confirm if you need a maintenance or therapeutic dose.
• Find the EPA + DHA per serving (not just total oil) in your fish oil supplement.
• The formula is Dog’s weight (kg) × target mg/kg = daily mg of EPA + DHA.
• Maintenance dosage (for healthy dogs): 25-30 mg/kg/day
• Therapeutic dosage (for joints, skin, kidney/heart, allergies): 60-90 mg/kg/day
• Confirm the exact dosage with veterinary guidance.
• Adjust daily servings accordingly.
• Observe your dog for signs of improvement or side effects.
• Recheck with your vet or canine nutritionist after a few weeks.

 

Frequently Asked Questions (FAQs)

Q) How much fish oil should I give my dog per day?

A) For general health maintenance, give 25–30 mg of combined EPA + DHA per kg of body weight per day. For Honst Sardine Fish Oil, that's approximately 1.5 ml per 5 kg of body weight daily.

Q) Can I give my dog fish oil every day?

A) Yes, daily use is recommended and safe at maintenance doses. Consistency over 6–8 weeks delivers the best results for coat, skin, and joints.

 Q) What happens if I give my dog too much fish oil?

A) Overdosing on fish oil can cause loose stools, vomiting, a greasy coat, or slow wound healing. Stick to the maintenance dose unless a vet has recommended a therapeutic dose for a specific condition.

 Q) Can puppies take fish oil?

A) Yes, puppies above 4 months of age can benefit from fish oil, as DHA supports brain and eye development. Stick to the maintenance dosage, unless prescribed otherwise by your veterinarian.

Q) Can I use human fish oil capsules for my dog?

A) You can, but check the EPA + DHA content per capsule and dose accordingly. Avoid products with xylitol or added flavourings that are unsafe for dogs.

 Q) How long before I see results from fish oil?

A) Most dog parents notice reduced scratching and itching within 1–2 weeks. Coat shine and reduced shedding typically appear by week 4–6 with consistent daily use.