Should large dogs avoid grain-free food with peas due to heart risk?

Hello and thank you for reaching out to Petco Pet Education Center, formerly Petcoach. If the study you are talking about is referring to DCM (dilated cardiomyopathy) in large breed dogs, I believe the correlation they are making is between grain-free diets and the development of DCM. Grain-free diets are very trendy right now, and there is NO benefit to feeding your dog a grain-free diet. Many small pet food companies are not well regulated for quality control, and oftentimes the nutritional information they provide on the bag is nowhere near what is actually in the food. Legumes and potatoes can be substitutes for grains, but they lack many of the essential nutrients that grains provide to dogs. This lack of specific nutrients can make dogs, especially large breeds, more prone to developing heart disease. I recommend feeding your dog a food formulated for adult large breed maintenance. Excellent brands are those like Hills, Royal Canin, Purina, and Blue Buffalo. These larger pet food companies are very well-regulated and nutritionally balanced for dogs. I hope this is helpful!