Virbac CET Enzymatic Oral Hygiene Chews for MD Dog 26-50lbs. 3pckC. E. T. Enzymatic Oral Hygiene Chews help reduce plaque and tartar with a Dual Enzyme System plus abrasive chew texture. Supports cleaner teeth and fresher breath when brushing isnt possible. ~30 chews. Key Bullet Points Dual Enzyme System supports daily dog dental care Helps reduce plaque and tartar with chewing action Abrasive texture helps clean teeth and freshen breath Great for days when brushing isnt possible Approx. 30 chews per pack (dental