Frozen salmon heads can pack a nutritional punch for your dog.  Whole Raw Fresh Frozen Salmon Heads. Low in saturated fats, great for weight control with the added benefits of Omega 3 fatty acids essential for joints, mobility and skin health. An amazing source of… Protein. Omega-3 fatty acids. Iron. Zinc. Calcium, and a good amount of. Vitamin A Heads vary in size, Skin & Bone included. £1.60 Per Pack (x2 Heads per pack)