Udos Choice Pet Essentials for Dogs is rich in certified organic seeds, whole foods, herbs, greens, trace minerals, and phytonutrients in their unaltered, natural state to give your pet optimum nutrition for maintaining an active, energetic lifestyle. Fiber and enzymes help maintain regularity and support the digestive system. Organic flax seeds support the cardiovascular system, help maintain good muscle tone, and promote a healthy and glossy coat. Greens are rich in chlorophyll, minerals, and trace elements. Pet Essentials contains no fillers, binders, or other non-nutrient ingredients. It has no preservatives or additives.