Plaque Zapper, Tasteless Water Fizzy for Cats and Dogs, Reduces Bad Breath, Plaque and Tartar, 30 Count, Small & Medium BowlsCAREFULLY CRAFTED IN THE USA: Our recipe is formulated with high quality and natural ingredients that are corn free, soy free, wheat free, and have no artificial colors or preservatives. EASY TO USE: Simply pour into your pet's water bowl twice a day. Enzymes remain active for 6-8 hours. NATURAL FORMULA: Plaque-Zapper contains naturally available enzymes that are activated by mouth saliva. As your pets drink from their water bowl, Plaque Zapper 'zaps' harmful mouth bacteria. SUPPORTS DENTAL HEALTH: Designed to be an odorless, colorless, tasteless every day dental health support. FORMULATED FOR SMALL TO MEDIUM PETS: Our vet recommended Plaque-Zapper is formulated for small to medium drinking bowls.