
Fish oil is highly regarded in veterinary medicine as a beneficial complementary therapy for dogs with certain heart problems, particularly congestive heart failure.
However, it is not a cure all, and it must be used correctly.
Fish oil contains high concentrations of Omega three fatty acids, specifically EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). In dogs with heart disease, these act in several specific ways.
Dogs with advanced heart failure often lose significant weight and muscle mass, a condition known as cardiac cachexia. Omega threes help reduce inflammation and metabolic changes that cause this muscle wasting, helping to maintain your dogs weight and strength.
Heart disease involves chronic inflammation that damages heart tissue and blood vessels. EPA and DHA help modulate the immune system to decrease this inflammation.
Omega threes can help stabilize the electrical activity within the heart muscle, potentially reducing the frequency or severity of dangerous irregular heartbeats.
Fish oil can help reduce stickiness in the blood, improving circulation and reducing the risk of blood clots.
While beneficial, you cannot simply add fish oil to a heart diseased dogs diet without professional guidance.
Your veterinarian needs to assess:
The type of heart disease.
Your dogs current medication (fish oil can interact with blood thinners).
The proper dosage of EPA and DHA.
The dosage for heart disease is different from the dosage used for skin or joint health. Giving too much can cause side effects like stomach upset, while too little will not provide the cardiac benefits.
Not all fish oils are equal. Look for brands that have been tested for purity (heavy metals like mercury) and concentration of EPA and DHA.
Blood Thinning: In very high doses, Omega threes can slow blood clotting. This must be monitored if your dog is on other medications.
Gastrointestinal Issues: Diarrhea, vomiting, or nausea can occur, especially if you start with too high a dose.
Weight Gain: Fish oil is calorie dense.