Seven Side Effects Of Too Much Salmon Oil For Dogs (And What To Do About It) | Brilliant Petcare



too much salmon oil for dogs

Seven Side Effects Of Too Much Salmon Oil For Dogs (And What To Do About It)

Vets say, “Sola dosis facit veneum” and its literal translation is “The dose is what matters”. 

Even drinking too much water might harm, so it is possible to have too much of a good thing when it comes to salmon oil too. 

The main side effects of too much salmon oil are hypervitaminosis D, vomiting, diarrhea, smelly breath, coat color change, weight gain, and itchy skin

Salmon oil for dogs is a highly safe product, and only in rare cases can it have adverse effects. However, this is often due to high dosages. On the whole, salmon oil offers many benefits for dogs and cats.

With the proper dosing, you can avoid side effects, and the usual way to resolve this issue is by reducing the dosage for a few days. 

Let’s dig deeper! 

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What Is Salmon Oil for Dogs?

Although salmon oil is a common supplement for many pet parents, we are here to remind you and take a glance at all the benefits. 

Salmon oil is derived from fresh salmon and is an excellent source of Omegas like EPA (eicosapentaenoic acid), DHA (docosahexaenoic acid), and ALA (alpha lipoic acid). 

This product is used as a supplementation in pets, usually in a liquid form, since pills are not our dog’s favorites. 

Salmon oil can lead to a better functioning nervous system. Additionally, salmon oil can reduce symptoms of itchiness, allergies, and dry skin. 

Its antioxidant and anti-inflammatory properties can be helpful in many disease treatments. Also, there is good evidence it is effective in combating arthritis pain. 

You thought that’s it? Well, you are wrong!

Regular salmon oil consumption can lead to a normal functioning cardiovascular system. Harmful levels of triglycerides can also be treated with salmon oil. 

Here is a list of some of the most common health benefits of our Brilliant Salmon Oil: 

  • Enhancing appetite 
  • Improved urinary system 
  • Shiny coat
  • Soft paws
  • Increased energy
  • Improved locomotory system – healthy joints
  • Improving cardiovascular system – healthy heart

Top tip: Before purchasing any supplement, get in touch and consult your vet. Side effects are usually seen when instructions are not followed.

In general, this is a very safe supplement for both humans and dogs. Its benefits are recognized worldwide, and this product is becoming very popular.

Brilliant Salmon Oil Professional is available in the US, while Brilliant Salmon Oil Original is available in the UK.

7 Potential Sides Effects From Too Much Salmon Oil for Dogs

There are a few ways to calculate the recommended dose for your pet. The dose depends on the dog’s weight and its current health status. 

However, the best thing you can do before adding any supplement to your dog’s kibble is to consult a professional. 

Extra info: Currently, our product is rated 4.5/5 by 6,319+ happy pet parents. However, if you have any concerns about our product, feel free to contact us.

We have a few instructions before using this product, but not following some might lead to side effects. 

Our experience: In the end, each dog reacts differently to different products, so don’t worry! For example, my dog can eat anything served in front of it, but my friend’s dog is the pickiest eater I’ve ever seen.

Our #1 advice is to add this product gradually, just like any other new product. Not following this advice or not giving the proper dosage may lead to the following side effects: 

  1. Hypervitaminosis D
  2. Vomiting
  3. Diarrhea
  4. Smelly breath
  5. Coat color change
  6. Weight gain
  7. Itchy skin

Hypervitaminosis D

Studies show that high dosages of supplements rich in vitamin D can lead to hypervitaminosis. The main symptoms are: 

  • Weight loss
  • Brown stools 
  • Lack of appetite
  • Apathy (no enthusiasm/energy)
  • Terminal coma 

These symptoms should never be underestimated. So, as soon as you notice them, take your dog to the vet. 

The treatment procedure consists of reducing or excluding salmon oil from the dog’s diet. 

Important info: This side effect is rarely seen; in general, hypervitaminosis D is rare in dogs. This side effect only occurs after improper dosing


Foods with fatty acids can lead to a better life and overall health in dogs. But you should be aware of the recommended dosage. 

Not all dogs can consume supplements. Some supplements may do more harm than good, depending on your dog’s health status. 

If your dog has some underlying disease, we emphasize consulting a professional before consuming it.  

Also, vomiting can occur if the supplement is not given gradually. 

However, our customers also reported reduced urge for vomiting due to our Brilliant Salmon Oil.

Top tip: Add salmon oil gradually to your pet’s bowl. If vomiting still occurs, stop adding salmon oil for a few days and gradually add reduced doses (1/4 of the recommended dose). 


Diarrhea is very common in pets after trying new food. So, take your time and don’t push any food too much. 

Some pets have sensitive stomachs, which is the reason for the diarrhea. If your dog has gastrointestinal issues, consult your vet if fatty acids suit your dog’s current status.  

But, be aware of the fact that EPA can reduce the symptoms of intestinal inflammation. According to studies, the side effects of Omegas are variable and uncommon. 

If diarrhea symptoms are not frequent, ease salmon oil, and try with normal dosages after a couple of days. 

Smelly Breath

Smelly breath in dogs can occur anytime, and it is not always related to food or supplements. 

Over time, dogs can build up plaque on their teeth, leading to smelly breath. Regular dental vet checkups are required because of this reason. 

If you notice smelly breath in your dog, try brushing your dog’s teeth and stop adding supplements for 2 days. If the smell doesn’t go away, visit a vet. If the smell goes away, try adding salmon oil again. 

Ultimately, even our breath smell changes after trying different food and supplements. If you can’t recall, try to sense your breath smell the next time you take vitamins. 

Customers of Brilliant Salmon Oil very rarely report smelly breath from their pet. This is because Brilliant Salmon Oil has a very mild smell and is super fresh. 

Coat Color Change

The interesting thing about Brilliant is that the production process is very quick, with almost no oxidation. Therefore, it contains 80% more astaxanthin than other products on the market. 

This compound is an antioxidant with a red pigment or carotenoid. 

Very occasionally pet parents report their dog’s coat achieves an orange hue after using salmon oil. However, this needs to be scientifically proven. 

Usually, our customers see skin and coat improvements after using Brilliant. 

If you notice orange pigmentation, you can reduce the daily dose of salmon oil. Overdosing might also be the reason behind this side effect.

Weight Gain

Excessive weight gain is not common when using Brilliant Salmon oil. The product is carefully made and contains just one ingredient. We advise reading the product’s label to verify all the nutritional values. 

Brilliant gives the best possible health benefits due to its gentle liberation with no excessive heat and no chemicals. 

Brilliant is often used for increasing appetite in dogs. It also has remarkable GI-positive effects. 

Itchy Skin 

Great salmon oil formulas should never cause itchiness as a side effect. Contrarily, Omegas create a skin barrier that acts as a moisturizer and helps protects the skin. 

So, itchy skin can only be seen in dogs that are allergic to salmon oil. This is another reason why gradual supplement adding is crucial. 

What is a Good Salmon Oil Choice for My Dog?

Brilliant Salmon Oil (Professional is available in the US) is a high-quality product that is the number one choice for many pet owners. You can buy Brilliant Salmon Oil online as well as on Amazon, Pets at Home, Jollye’s and Pets Corner. 

Here are some of the benefits of this salmon oil: 

  • It contains all 21 omega-fatty acids
  • 100% pure and totally fresh
  • No toxicity
  • Zero chemical processing
  • Natural orange color
  • Fresh salmon taste
  • Fresh salmon smell
  • Traced from fjord to bottle
  • Minimal environmental impact

Read more: Find out the differences between Brilliant and other salmon oil products for dogs.

How Should I Store My Dogs Salmon Oil Supplement?

Salmon oil, in general, is prone to oxidation. That’s why salmon oil should be stored in an air tight container when manufactured.

Once opened, we recommend you use your salmon oil bottle within 4 months. This way, you avoid the risk of oxidation and rancidity. Until you open the bottle though, Brilliant Salmon Oil has an industry leading shelf life of 3.5 years!

Additionally, you should keep it away from light and air exposure. 

Our recommendation: Keep the salmon oil unopened until use, and then consume within 4 months.

Remember that improper storage can lead to side effects due to light or heat exposure. To get the best of this product, it is essential to store it properly.

How to Dose Brilliant Salmon Oil? 

Our 300ml bottle contains 300 pumps, while the 1000ml bottle contains 1000 pumps. 

Our daily recommended dose is 1 pump per 6.6 lb (3kg). However, if your pet is new to marine-based supplements, we suggest smaller doses and gradually increasing it as pets get accustomed to it.

The maximum allowed is 12 pumps per day.

Dogs should consume 75-100 mg / kg of good quality fish oil. This can vary depending on your dog’s health status. 

Dog Size Pumps Dosage (ml)
6.6 lb (3kg) 1 1 ml
13.2 lb (6kg) 2 2 ml
19.8 lb (9kg) 3 3 ml
26.4 lb (12kg) 4 4 ml
33 lb (15kg) 5 5 ml
39.6 lb (18kg) 6 6 ml
46.2 lb (21kg) 7 7 ml
52.9 lb (24kg) 8 8 ml
59.5 lb (27kg) 9 9 ml 
66.1 (30kg) 10 10 ml
72.7 lb (33kg) 11 11 ml
79.3 lb + (36kg +) 12 12 ml 

To Sum Up: Side Effects Regarding Salmon Oil

If you follow Brilliant’s instructions, the chances of your dog getting side effects are minor

However, nothing can be excluded. Each dog is considered an individual depending on its health status, daily habits, weight, etc. 

So, before purchasing our oil, make sure to consult with a veterinarian. 

Get your bottle of Brilliant and enjoy the many health benefits!

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