Redbarn's Lamb Lung Filet dog treats are made with one simple ingredient; lamb lung. These treats are a great source of protein and are easy to break into smaller pieces, making them great natural training treats! Free from wheat, corn, soy, grains, and gluten as well as artificial colors, flavors, and preservatives. Each treat contains only 19 calories per treat and are low in fat. Not only are these treats high in protein, they make for a great dental treat as they gently scrape away at plaque and massage your dog's gums at the same time.