Giselle, I've heard mostly good about raw but was thinking of a lady in Tasha's obedience class when she was a pup who was saying their dog was having trouble digesting the bones and kept having digestive problems. Now they may not have been doing it right, but she claimed she had had other dogs on it and they did good, but that this particular dog did better on a bland kibble. That's the only specific "bad" story I can really think of right now other than the problems that arise if it isn't done correctly.