Many dogs have allergies to some of the most common grains used to add carbohydrates to commercial pet food including wheat, corn, rice, barely and oats. (topdogtips.com)
On the other hand, if your dog isn't allergic to grains, you don't have to avoid some of the less common grains such as oats and barley. (pawster.com)
Unlike more common grains such as wheat, quinoa is gluten - free. (lovechock.com)