Treats made the West Paw way: Healthy, Safe, and Responsibly. Available in Bison Heart, Bison Lung, and Beef Lung. All three flavors are air-dried to safely retain the nutrition that dogs love and need. Bison is Humanely raised and sustainably sourced in the USA & Canada / Beef is Humanely raised and sustainably sourced in Montana, USA. Nothing artificial & no preservatives.