Dog food types
What is freeze dried dog food?
Last updated 23 September 2026 · How we write and check this
Short answer
Freeze dried dog food is raw or cooked food that has had nearly all its moisture removed through a slow, low temperature vacuum process rather than heat drying, leaving a lightweight, shelf-stable product that retains much of the original nutrient and flavor profile of the fresh ingredients.
How the freeze drying process works
The food is first frozen solid, then placed in a vacuum chamber where the ice turns directly to vapor without passing through a liquid state, a process called sublimation, removing moisture down to around 2 to 5 percent without exposing the ingredients to high heat.
How this differs from dehydrating or extruding
Standard dehydration uses warm air over several hours and can degrade some heat-sensitive nutrients, while extrusion for kibble involves high heat and pressure; freeze drying's low temperature process is gentler on nutrients but is significantly more expensive to produce.
What the finished product is like to feed
Freeze dried food is typically sold as crumbles, patties, or nuggets that are very light for their size and can be fed as is or rehydrated with water depending on the product and your dog's preference.
Key takeaways
- Freeze drying removes moisture through sublimation in a vacuum, without exposing food to high heat.
- It retains more nutrients than standard dehydration but costs more to produce.
- The finished product is lightweight, shelf stable, and can often be fed dry or rehydrated.