They are less expensive to use today than corn, which is also used as a source of protein in dog foods. (dogfoodinsider.com)
Additionally, these foods do not contain grains such as corn, wheat, gluten, and soy can sometimes be used as a source of protein instead of meat. (dogfoodselector.com)
So you can use these beans as a source of protein in foods that are gluten free. (forkoffgluten.com)