(Nordic Naturals) Cod Liver Oil for medium to large dog breeds. Cod Liver Oil is an exceptional quality product derived exclusively from wild Arctic cod. The important Omega-3 fatty acids, EPA and DHA, support healthy skin, coat, joints, heart and the development and maintenance of the brain and eyes. With naturally occurring vitamin A to support healthy vision, immune function, and healthy bones. Unflavored. Feed daily on food or serve by itself. Daily dosage for dogs 20-39 lbs: 2.5 ml. 40-59 lbs: 5 ml. 60-79 lbs: 7.5 ml.