I have a 10 year old dog who was on Nutro Natural Choice Lite for many, many years. She would often vomit bile in the afternoon. The vet said (just like others have said) that some dogs just do that. In January for some reason I started looking at other dog foods, found lots of info online and switched to Canidae Life Stages. My dog had an immediate change for the better - no more afternoon vomiting and her coat is just the softest, most beautiful coat I've ever seen on her. The change was drastic, even the vet commented before I even told her of the diet change. I'm so angry knowing that for years the poor thing was vomiting because of something I was giving her.