100% Free Range Brazilian Beef dog chews are from Brazilian cattle that are grass-fed only, resulting in lean meat and lower fat throughout. All Free Range cattle products are Hormone-FREE. No antibiotics, No mad cow and No animal by-products are ever added to the cattles all-natural grass diet. Free Range slow-roasts all their products at low temperatures making their meaty bones and tendons healthier, safer and cleaner than typical beef bones that are boiled. Each bone is individually wrapped for sanitation and cleanliness.