Air-drying combines the best of cooked and raw approaches. Like raw (and raw processing methods like "freeze-dried raw"), air-drying preserves nutrients and taste better than high heat methods. Unlike raw, Sundays' unique air-drying process involves a "kill step," which eliminates pathogens, so unlike freeze-dried raw or frozen raw dog foods, there is no food safety or handling risk with Sundays.
Sundays' air-drying all makes the food dry enough to last for weeks after opening, but has enough moisture to eat without any additional preparation. That's easy Sundays for you!