NutriBites Freeze Dried Beef Liver Dog & Cat Treats are made with a single, high-quality ingredient -fresh raw beef liver. They are a great source of minerals, including iron, magnesium, selenium, and zinc, and contain vitamins that promote brain health and improve immune function. NutriBites Freeze-Dried Treats for Dogs & Cats, Beef Liver, 27 oz Natural Treats for Dogs and Cats Fresh raw beef liver Freeze-dried 27 oz bag Grain free Gluten free High protein No artificial preservatives or additives Zinc and vitamin A to help improve the immune system