OraVet dental chews are great tasting and not only clean teeth, but they also create a barrier against plaque, calculus, and bad breath. OraVet Dental Hygiene Chews are the only dental chews that contain the ingredient delmopinol, used in human oral care rinse. Delmopinol coats the teeth, creating a barrier against the bacteria that lead to the formation of plaque, tartar, and bad breath.