Eliminate tear stains safely and effectively from the inside out! Just measure as directed, and sprinkle on dog's food daily to get rid of unattractive, foul-smelling tear stains. The active ingredients in this powerful formula work to prevent dogs from contracting Ptyrosporin (Red Yeast) and bacterial infections that cause excess tearing and staining. Beef flavor. Wheat and dye free. Safe for puppies 8 weeks and older and safe during pregnancy.