Embodiments of the present invention are directed to methods and apparatus for the treatment of plaque, halitosis and other oral diseases in animals such as dogs. The methods and apparatus feature the administration of molecular iodine at a concentration that is effective and accepted by animals. Clinical trials show that the dose should not be below 0.5 micro grams/mL and not above 2.0 micrograms/mL. Concentrations outside this range are not effective on the low side and refused by the animal on the high side.
