The recommended dosage of fish oil for dogs, which is dependent on a dog's weight, is 20 milligrams of EPA per pound, states the Canine & Conditioning Rehabilitation Group. This supplement should contain both EPA and DHA, which are types of omega-3 essential fatty acids found in fish oil. Fish oil supplementation is important for dogs because dog food does not contain enough of this nutrient.
The essential omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are necessary in a dog's diet because they provide a variety of benefits, including improving the condition of the coat, avoiding dry skin and reducing inflammation. Fish oil supplementation may also reduce the risk factor for stroke and heart problems, keep the joints functioning properly and work as an antioxidant to reduce the risk factor for cancer, notes the Canine & Conditioning Rehabilitation Group.