Give your pup a simple, wholesome reward with Birch Bites Small Beef Lung. Made with just one ingredient, high-quality locally sourced beef lung, these treats are cut into convenient 3/8-inch cubes and freeze-dried to help preserve their natural nutrients and flavor. Each 1 oz resealable bag is a great sample size for smaller dogs, training sessions, or everyday rewards. Each treat contains an average of 5 calories, with a minimum of 70% crude protein. No fillers, preservatives, or harsh chemicals are added. Store in a cool, dry place and do not refrigerate.