Vital Essentials Vital Cat Duck Liver Freeze-Dried Cat Treats are made from USDA, pure, raw, Freeze-Dried Duck Liver. We never use added hormones or antibiotics, no added fillers, flavoring or rendered by-products. Single ingredient, high protein cat treats support your cat?s health, naturally. Made with 100% pure USA sourced duck liver, these freeze-dried grain free treats are purr-ific. Cats love the taste because we use a 48-hour slow freeze-drying process that locks in the natural flavor, texture and freshness of the meat without compromising the nutritional value. A healthy, nutritious and delicious way to feed your cat between meals. Treats with real meat your cat instinctively craves.