very cool! there's a variety of freeze-dried dog foods available in the US.
There is Stella and Chewy's and Nature's Variety which makes freeze-dried, and you can feed these without rehydrating. We brought S&C when we traveled across the US with the dogs.
There is also Honest Kitchen, although this one needs to be re-hydrated before feeding. Like K9Natural.
10lbs of it makes 43 pounds of fresh food too.