Air drying involves slowly removing moisture from the ingredients at low temperatures over a longer period of time. This method helps preserve the nutrients and flavors while inhibiting the growth of bacteria.
The air-drying process tends to retain more moisture than freeze-drying, resulting in a softer texture that many dogs find more palatable. Freeze drying involves freezing the ingredients and then subjecting them to a vacuum that removes the moisture through sublimation. This process directly converts water from a solid into vapor, skipping the liquid stage.
The freeze-drying process retains the nutritional integrity of the ingredients, and the moisture content is reduced.
Learn more about air-dried dog food.