ORIJEN Regional Red Freeze Dried Cat TreatsORIJEN freeze dried treats are prepared without cooking, so they retain all of the natural goodness of our authentically fresh ingredients. Our freeze dry kitchens are equipped with nitrogen tunnels which flash freeze our fresh ingredients at extremely low temperatures ( 60F), locking in their life giving nutrients. Then an 18 hour freeze drying process gently converts the water frozen in the ingredients into ice vapor, without creating any liquid.