Our 100% natural and edible Icelandic Cod Skin Large Cube is a single ingredient dog treat and contains no additives, preservatives or supplements. They come only from the pure icy waters of Iceland and are line-caught daily and processed immediately. Not only are they delicious for your dog, they reduce tartar and plaque build-up for healthier gums and teeth. They are also a great natural source of Omega-3 fatty acids, promoting healthy skin and coat for your pet. With just one ingredient, these tasty and healthy treats are perfect for dogs with protein sensitivities.