OraClensreg; Oral Hygiene Chews Small (30 Chews);features a blend of the enzymes Lacto peroxidase and Glucose Oxidase, which help prevent plaque and tartar build up as well as promote clean teeth;Oral Hygiene Chews also feature an abrasive texture, which help scrub your dog's teeth while he chews;Note: Expiration date format is YY/MM/DD