Practical information about commercial pet foods and what goes into them.
Ingredients in Pet Food
While there is a belief that grains are only used as "fillers" or may be a cause of food allergies, grains are in fact a valuable source of nutrients in pet food.
"Grains are not just added to pet food for bulk, they are actually a valuable source of nutrients. Allergies to grains or gluten are extremely rare in dogs and have never been reported in cats."
Masisi, K., Beta, T., & Moghadasian, M. H. (2016). Antioxidant properties of diverse cereal grains: A review on in vitro and in vivo studies. Food Chemistry, 196, 90–97. doi: 10.1016/j.foodchem.2015.09.021
Jaworski, N. W., Laerke, H. N., Knudsen, K. E., & Stein, H. H. (2015). Carbohydrate composition and in vitro digestibility of dry matter and nonstarch polysaccharides in corn, sorghum, and wheat and coproducts from these grains. Journal of Animal Science, 93, 1103–1113. doi: 10.2527/jas.2014-8147
Verlinden, A., Hesta, M., Millet, S., & Janssens, G. P. J. (2006). Food allergy in dogs and cats: A review. Critical Reviews in Food Science and Nutrition, 46, 259–273. doi: 10.1080/10408390591001117