This 4-ounce, resealable bag of bison lung filets treats is a pantry must. These dog jerky treats are protein-packed, featuring hearty bison lung filets. The flavor comes from sustainable, pasture-raised, grass-fed bison. Free of hormones, antibiotics, artificial colors & preservatives. 100% air-dried bison lung. Crunchy, healthy, single-ingredient goodness for your pup. Made in the USA!