Is Kirkland Fish Oil Safe for Dogs – The Honest Truth

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Ever wondered if that Kirkland fish oil sitting on your shelf could be a beneficial supplement for your furry friend? We’re here to answer whether human-grade fish oil supplements can be safely given to your dog.

The Short Answer

In general, you can give Kirkland Fish Oil to dogs. It is rich in healthy fats, the Omega-3 fatty acids, which are beneficial for a dog’s skin, coat, joints, and heart health. However, there are health factors to consider before you give your dog this supplement.

While fish oil can be a wonderful addition to your dog’s diet, consider factors such as the right dosage, potential side effects, and how it might interact with other aspects of your dog’s health care routine.

All of this and more is covered in this blog post, so let’s check it out.

close up of white and brown dog outside near grass

The Fuss About Kirkland Fish Oil

Kirkland Signature Fish Oil is a popular supplement due to its high-quality ingredients and affordability.

It’s packed with Omega-3 fatty acids, specifically EPA and DHA, which play a crucial role in supporting heart health, reducing inflammation, and, in the case of dogs, promoting a shiny, healthy coat.

The fuss about Kirkland fish oil isn’t just hype – its benefits for canine companions are backed by numerous studies. However, there are a few cons to consider and things to keep in mind.

Pros and Cons of Kirkland Fish Oil

Like any supplement, Kirkland Fish Oil comes with its own set of pros and cons.


  • Quality. Kirkland is a trusted brand known for using pure and high-quality ingredients.
  • Value. This supplement provides excellent value for money, considering its quality.
  • Omega-3 fatty acids. These help in promoting a healthy coat, reducing inflammation, and supporting heart and joint health.


  • Dosage. Since it’s made for humans, dosing can be a challenge for smaller dogs.
  • Coating. Some dogs may not like the gelatin coating of the capsules.
  • Potential side effects. Overdosing can cause diarrhea or upset stomach.

Remember, while Kirkland fish oil can be a great supplement for your dog, always consult your vet before adding anything new to your dog’s diet.

Human Fish Oil vs Dog Fish Oil: Any Differences?

When it comes to fish oil, you might be wondering what separates the human-grade product from the one specifically designed for dogs.

Here’s the catch: the actual Omega-3 fatty acids in both products are the same, meaning they have the same health benefits. However, the differences lie primarily in the dosage and format.

Human fish oil supplements like Kirkland often come in softgel capsules, which can be a bit tricky to administer to a dog, especially a small one. Plus, these supplements are typically designed to meet the nutritional needs of an average adult human, not a dog.

On the other hand, dog-specific fish oil supplements often come in a more pet-friendly format, like a liquid that can be easily mixed into your pet’s food, or chewable treats. They also typically come with dosing instructions that account for the size and weight of your dog, taking some guesswork out of the equation.

So, in a nutshell, while the Omega-3s in human and dog fish oils are the same, the delivery system and dosing can vary greatly, which is why you should always consult your vet before deciding to supplement your dog’s diet with fish oil.

How Much Fish Oil Can I Give My Dog?

So now we know Kirkland fish oil can be given to dogs, the question is: how much is safe?

Well, that depends on your dog’s weight, diet, and overall health status. As a general rule, dogs can typically tolerate about 20 mg of EPA and DHA (combined) per pound of body weight. This would mean a 30-pound dog could theoretically handle about 600 mg of fish oil per day.

However, remember that this is just a general guideline, and your dog’s needs may vary.

You also want to account for any other sources of Omega-3s in your dog’s diet, as too much can lead to side effects like diarrhea and blood clotting issues.

As with any dietary supplement, it’s always a good idea to consult your veterinarian before adding fish oil to your dog’s diet. They can provide the most accurate dosage based on your dog’s unique needs and monitor for any potential side effects.

What Do Vets Say About Fish Oil?

Veterinarians generally have a favorable view of fish oil as a supplement for dogs.

They often recommend it for its numerous health benefits, from promoting a shiny coat and healthy skin to supporting joint health and heart function.

However, as with any supplement, vets also caution about potential side effects and the importance of proper dosage.

Speaking of veterinarians, let me share a personal story. When Sam, my older dog, began to slow down in his golden years, our vet suggested we add a fish oil supplement to his diet to help his joint health.

We went with a dog-specific brand Zesty Paws, and over time, we saw noticeable improvements in Sam’s energy levels and mobility. It wasn’t a miraculous overnight change, but a gradual one. His enthusiasm for our morning walks returned, which was heartwarming to see.

This is just one example of how fish oil can benefit our furry friends, but remember, always consult with your vet before making any dietary changes.

Suggested read: All about Dog Skin Issues – Treatment and Prevention


Can Kirkland fish oil cause any side effects in dogs?

Kirkland fish oil, like any other fish oil, can cause side effects in dogs if given in excess. These can include bad breath, loose stools, and upset stomach. Always start with a lower dose and monitor your dog’s reaction.

How do I know if my dog is allergic to fish oil?

A dog allergic to fish oil may show signs like skin rashes, gastrointestinal upset, or difficulty breathing. If you suspect an allergy, discontinue the supplement and consult your vet immediately.

Is there a specific time of day to give my dog fish oil?

There’s no strict rule for this. Fish oil can be given at any time of day that fits your routine. Many owners find it easiest to mix it into their dog’s food during meal times.

Can I give my dog Kirkland fish oil if he is on other medications?

Generally, fish oil can be given alongside other medications, but it’s best to discuss this with your vet. They can assess any potential interactions and provide an appropriate dosing schedule.

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