This item is Currently Out of Stock and Should be Shipped 4-6 Weeks. Sentry HC Petrodex Dental Strips makes a treat out of dental care for your dog. Petrodex Dental Strips use a patented enzyme formula to keep your dogs teeth clean and breath fresh. These treats are designed to work with your dogs natural chewing action to help prevent plaque and loosen tartar. Cleans teeth and freshens breath Patented enzyme formula Premium beefhide.