Vets Best Dental Breath Freshener for dogs is a water additive that de-odorizes your pets breath no brushing required Containing natural anti-bacterial agents, Vets Best breath freshener has been specially formulated to tackle sources of bad breath in dogs which form in the mouth Simply add a teaspoon (approx 5ml) to your pets fresh drinking water to freshen breath Natural ingredients include Peppermint oil and clove oil We recommend this product be used in conjunction with Vets Best Dental toothpaste gel for an overall oral care solution.