Most commercial dog foods use preservatives to give their food a longer shelf life. In fact, no meat (beef, chicken, turkey, etc.) can stay at room temperature for more then a few hours. That is why it is so obvious that commercial dog foods use so many preservatives to keep the meat that they do use from spoiling. They use dyes and artifical flavorings (chemicals) to enhance the way the food looks and tastes. These additives can have detrimental effects on your dog’s short and long term health. We have seen dramatic improvements, in many conditions, when a dog is changed to a diet without preservatives, dyes, and chemical additives. Dr. Harvey’s Canine Health contains no dyes, no preservatives, and no chemicals, which is just one of the reasons that we have seen such positive results when dogs switch to Dr. Harvey’s.