Hartz Chew 'n Clean Dental Duo is a long-lasting chew toy and treat all in one! It's constructed from durable materials that withstand mild to moderate chewing. Enriched with a delicious, edible bacon flavored center and our DentaShield technology, the Dental Duo reduces new tartar formation by bonding with components in your dog's saliva. The chewing action helps reduce tartar build-up, freshen breath and promote healthy gums.