As I had to Google it - apparently BARF is "Biologically Appropriate Raw Food".
I have to say I get the concept. Dogs just didn't evolve to eat the weird hard little grain-based pellets that a lot of people feed to them. Then again, humans didn't evolve to eat a modern Western diet either. Considering the number of fat and unhealthy dogs I see is starting to rival the number of fat and unhealthy people, perhaps that tells us something.
Just as a short aside, IIRC there is evidence that because of the very long association between humans and dogs, dogs actually _did_ evolve to make good use of some of humans' throwaways, compared to their wild relatives.
I don't have a dog, so didn't save the link, but for dog caretakers some literature review might do good (also, maybe consensus improved since then).
EDIT: obviously that doesn't necessarily translate to modern dry food.
Consider also that dogs have a shorter generation time than humans. Most dogs have eaten a grain-based diet ever since their domestication, because it's cheapest.
I have to say I get the concept. Dogs just didn't evolve to eat the weird hard little grain-based pellets that a lot of people feed to them. Then again, humans didn't evolve to eat a modern Western diet either. Considering the number of fat and unhealthy dogs I see is starting to rival the number of fat and unhealthy people, perhaps that tells us something.