Tear stains are common in dogs, especially smaller breeds like the Maltese and shih tzu. Tiny tear ducts are most likely to blame for the stains that accumulate underneath their eyes. If your pooches have tear stains, there are many ways to clean them and prevent new ones from forming.
Tear stains--the brown, streaky stains in the corners of and under some dogs' eyes--are caused by pigment, yeast and bacteria buildup. These stains are most obvious on white dogs, like Maltese. Wipe away tear stains using at-home techniques and preventive care to keep your white dog looking its best.