A comestible, water-based composition containing natural ingredients provides an effective amount of at least one active ingredient selected to reduce the proliferation of bacteria in the mouth of animals to treat and improve the dental health of animals. The composition can be administered to animals in the form of their daily intake of water and may be especially packaged for ready use and consumption by animals in pre-packaged and portable doses. Compositions containing natural ingredients and formulated as toothpastes for animal dental care are also provided.