[anonymous]

There is a possibility that your dog’s symptoms have absolutely nothing to do with his diet.
I would check back with your vet if symptoms continue. Diagnostic testing may be needed to get to the cause. Was lab work done? Pancreatitis ruled out?

Hope this helps:
http://www.vetstreet.com/care/gastroenteritis-vomiting-and-diarrhea-in-dogs-and-cats