The Evanger's Nothing But Natural Beef Liver Gently Dried Dog & Cat Treats are su-paw tasty single ingredient treats. They’re made of pure beef liver, so they’re paw-some for picky pets or pets with food sensitivities. These treats are grain- and gluten-free, and are Kosher for Passover. They’re free of additives or artificial ingredients and are packed full of nutrients. Use them as a treat, training award or food topper, or reconstitute them in warm water for a savory snack.