What does “Natural Flavor” mean in your ingredients? October 15, 2018 22:40 The natural flavor we use is plant and/or mineral derived with no artificial or synthetic additives. Related articles Is your oat flour grown with glyphosate (Round up)? Does your Green Tea extract have caffeine in it? Don't dogs need meat? What are mixed tocopherols (preservative) in your treats? What's the benefit of your subscription service?