12 PACK Hartz 05415 Chew ‘N Clean Dental Duo Dog Chew & Toy A chew toy and treat all in one! Satisfy your dog’s natural urge to chew while promoting the dental benefits of clean teeth and general oral health Includes a medium version of our signature Dental Duo for medium dogs 20-50 pounds Long-lasting chew has a durable nylon shell combined with a tasty bacon flavored treat For mild to moderate chewers. Not recommended for aggressive or avid chewing Colors vary.