kirkland signature dental chews 72 dog treats kirkland signature every dog deserves clean teeth! grain-free and gluten-free dental chews are safely digestible, with no artificial colors, flavors or preservatives. the chews are two-sided, with a groove and multiple levels of ridges and nubs to help clean teeth and reduce plaque and tartar from a variety of angles: the easy "paw‐grip" handle is designed to work with your dog’s natural, instinctive chewing style.