Organ meats are one of the most nutrient dense foods you can give to your dog. In fact, entrails contain significantly more vitamins, minerals and other valuable nutrients than lean muscle meat. In addition to premium quality protein and fat, organ meats are plentiful sources of the vitamins A, B, D and E, as well as minerals like copper, iron, phosphorus, selenium and zinc. All of these are essential for the health of your canine.