Everlasting Dog Treat is made of all natural products, consisting of yak’s milk, cow’s milk, and lime juice. No chemicals or preservatives, it is 100% Natural. Extremely high in protein with a minimum content of 52.6% protein and up to 70% protein content, ensuring a healthy treat for your dog. This product is also gluten free. These treats are formulated from an ancient recipe and are naturally solid to provide hours of chewing.