Salmon skins are nutritious, and a natural source of omega-3 fatty acids, protein (including lots of collagen), vitamins (such as vitamin D and B vitamins), and minerals (such as phosphorus).
Salmon is a beneficial part of your dog's regular diet, as the nutrients found in salmon play a role in skin and coat health, support the immune system, and decrease inflammation. Even more importantly, omega-3 fatty acids are incorporated in the cell membranes of all body tissues, including the brain.