Well two reasons why Izzy is not on RAW or freeze-dried RAW (The Honest Kitchen which she was on until she was diagnosed with pancreatitis).
1) being a therapy dog the hospital will NOT let anyone with a dog on RAW be in the program. This is the Cleveland Clinic rules - their infectious dept. really checks into this and I had to sign a waiver stating that she was not on any type of RAW.
2) her pancreatitis...too high fat and protein.
My vet (and all the vets in this clinic we go to) are not fans of Raw for many reasons but to each his own and if it works for you and your doggie then go for it.
I say whatever keeps your dog healthy and alive works in my book.