California Natural Herring & Sweet Potato Formula dog food has been formulated based on our time-honored pure & simple philosophy: less is more! What makes California Natural products so special is not only what we put into the formula, it's also what we leave out that can make the difference to your special dog. Rather, our singular attention to unique ingredient selection assures a simple and uncomplicated formula for your special dog. Our customers continue to request that we make diets using alternative protein sources. California Natural Herring & Sweet Potato Formula provides another pure & simple choice.