Grass Fed :: Free Range :: 100% Natural. Our Water Buffalo Tracheas are sourced in Northern India from a trusted and reliable exporter that we know personally and have been doing business with for years. ALWAYS SUPERVISE YOUR DOG WHILE CHEWING ANY TREAT. NO Preservatives, additives, antibiotics, hormones, fillers. NO Glycerins, Glutens, Natural Flavorings, Grain. Ingredients: Grass Fed, Free Range Water Buffalo Tracheas.