Stewart Freeze-Dried Beef Zen Dog Treats. Crafted with passionflower add fruit flavor and to help relieve anxiety. The freeze-drying process locks in the nutrients and benefits of raw food. Contains no additives and no preservatives. Free from corn, soy, wheat, grains, gluten, legumes, and lentils. High in herbal valerian root to provide natural relaxing effects for restless dogs and to help relieve anxiety. An all-natural CBD alternative.