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Is it Safe to Give Fish Oil to Your Dog? Fish oil supplements for both humans and pets are common. However, with so many options, it can be difficult to understand the differences among them. While some fish oils are formulated for humans, others are specifically designed for dogs. Nonetheless, pet owners must ensure that the fish oil they are giving to their dogs is safe and beneficial.

Is it Safe to Give Fish Oil to Your Dog?
What Is Fish Oil?
Fish oil is a product extracted from the tissues of fish like anchovies, salmon, herring, sardines, or mackerel. This oil is used for both humans and dogs, as it contains omega-3 fatty acids, which are beneficial components.
The most common form through which humans and dogs receive fish oil is in liquid oil or a soft gel capsule. Nonetheless, it is also used as an ingredient in dog food, soft chews, tablets, and treats. However, the amount in these products may not be significant enough to provide the major benefits that can be derived from standalone fish oil supplements.
Types of Fish Oil
Different types of fish oil supplements are available, including triglyceride, ethyl ester, and free-form fatty acids. Some forms of fish oil may be more concentrated than others, which can limit the amount of oil being ingested, while still providing the necessary levels of omega-3 fatty acids. All three forms are considered safe for both dogs and humans as long as the recommended administration levels are not exceeded.
What are Omega-3 Fatty Acids?
Omega-3 fatty acids are components present in fish oil supplements that make them beneficial to both dogs and humans. In the body, a group of molecules called eicosanoids plays a crucial role in inflammation and performs other vital functions. Omega-3 fatty acids help the body produce more beneficial eicosanoids.

Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are the most analyzed types of omega-3s. Nevertheless, there are actually 11 common types. Though product labels may enumerate these types, EPA and DHA are often the most common types of omega-3s present in fish oil supplements for dogs and humans.
- Docosahexaenoic acid (DHA)
- Eicosapentaenoic acid (EPA)
- α-Linolenic acid (ALA)
- Eicosatetraenoic acid (ETA)
- Hexadecatrienoic acid (HTA)
- Stearidonic acid (SDA)
- Eicosatrienoic acid (ETE)
- Heneicosapentaenoic acid (HPA)
- Docosapentaenoic acid (DPA)/Clupanodonic acid
- Tetracosapentaenoic acid
- Tetracosahexaenoic acid (Nisinic acid)
The omega-3 levels of EPA, DHA — as well as ALA and ETA — are indicated on products, and the amount of administration is based on these levels. The advice of a veterinarian should be sought regarding the recommended amounts of omega-3s, depending on a dog’s specific health issues, e.g., skin and coat, kidney, heart, joints, or brain support. It is essential to discuss the appropriate amounts of omega-3 supplementation for dogs, as the administration recommendations for humans may differ.
Benefits of Fish Oil
Omega-3s are beneficial to your dog’s heart, skin, immune system, joints, and more. Your veterinarian will recommend specific levels of EPA, DHA, or other omega-3s depending on specific dog needs. For instance, if you plan to support your dog’s skin and coat health or if your dog is itchy, the veterinarian may recommend a specific EPA or DHA dosing.

However, higher doses may also be recommended for eg. brain, kidney, heart, and joints support. It is best to discuss these matters with your veterinarian.
The omega-3 supplementation recommended for humans and dogs vary and therefore as a pet owner, one must ensure that appropriate amounts of beneficial omega-3s are administered to their dogs.
Fish Oil for Humans vs. Dogs
Some fish oils may have added ingredients like sweeteners or flavourings that may be harmful to dogs. However, if the fish oil supplement is purely made of fish oil, it may be safe to give it to dogs, but it is important to consult the veterinarian first to confirm whether it is safe or not.
Side Effects of Fish Oil
Fish oil is usually safe for dogs when administered at the recommended levels. Some dogs may experience gastrointestinal reactions such as vomiting and diarrhea, but this generally improves after a few days. If the product is discontinued, the fishy smell in breath and skin, as well as excessively oily coats, will go away within a week or so.
Frequently asked questions when dogs use Fish oil
Can dogs use fish oil?
Yes, fish oil can be a beneficial supplement for dogs, especially for their skin and coat health. It contains omega-3 fatty acids, which can help reduce inflammation and support overall health.
What are the benefits of fish oil for dogs?
Fish oil can provide a range of benefits for dogs, including improved skin and coat health, reduced inflammation, improved joint health, and potentially reduced risk of certain diseases such as heart disease and cancer.
How much fish oil should I give my dog?
The appropriate dosage of fish oil for dogs can vary based on the dog’s size and individual needs. It’s best to consult with your veterinarian to determine the appropriate dosage for your dog.
Can fish oil cause any side effects in dogs?
In some cases, high doses of fish oil can cause gastrointestinal upset or diarrhea in dogs. Additionally, if the fish oil is rancid or of poor quality, it could potentially cause additional health problems. It’s important to choose a high-quality fish oil supplement specifically formulated for dogs.
Can all dogs benefit from fish oil supplements?
While fish oil can be a beneficial supplement for many dogs, not all dogs may need it or tolerate it well. It’s best to consult with your veterinarian before starting any new supplements to determine if they are appropriate for your dog.
Are there any precautions I should take when giving my dog fish oil?
It’s important to choose a high-quality fish oil supplement specifically formulated for dogs, as some human supplements may contain ingredients that are harmful to dogs. Additionally, it’s important not to exceed the recommended dosage, as excessive amounts of fish oil can cause health problems.
Can I give my dog fish oil if they are already taking other supplements or medications?
It’s important to consult with your veterinarian before giving your dog any new supplements, especially if they are already taking medications or have health conditions. Some supplements and medications can interact with each other and cause unwanted side effects.
Are there any other dietary supplements that can benefit dogs?
Yes, there are many other dietary supplements that can benefit dogs, including probiotics, glucosamine, and chondroitin. However, it’s important to consult with your veterinarian before starting any new supplements to ensure they are appropriate for your dog and won’t interact with any other medications or supplements they are taking.
Conclusion
In conclusion, fish oil can be a beneficial supplement for dogs, especially for their skin and coat health. It contains omega-3 fatty acids, which can help reduce inflammation and support overall health. However, it’s important to choose a high-quality fish oil supplement specifically formulated for dogs, as some human supplements may contain ingredients that are harmful to dogs.
The appropriate dosage of fish oil for dogs can vary based on the dog’s size and individual needs, and it’s important not to exceed the recommended dosage. While fish oil can provide a range of benefits for many dogs, it’s important to consult with your veterinarian before starting any new supplements to determine if they are appropriate for your dog and won’t interact with any other medications or supplements they are taking.
You can find more information in: What Can Dogs Eat?