In general your vet doctor will be able to give you a concise list of things to watch out for before buying a food for your dog with a sensitive stomach. (itday.com)
We have always stayed away from buying food from the vet. (fidoseofreality.com)
When buying your food at the supermarket, make sure that you read the labels as some products contain hidden additives and preservatives. (detoxideas.thebestfreeinfo.org)