There is nothing more beautiful than a well-groomed pup with white hair, that is unless your pup happens to have stains underneath his eyes. In some cases, these stains can be the result of certain health issues, caused by nutritional issues, or the result of breeding that has occurred over countless generations. The good news is that in most instances, there is a way to prevent these unsightly stains from appearing. With the right care, most of these stains can be removed. Be sure to consult your veterinarian to rule out any medical causes before you attempt any preventative measures.
Your pup's tears are his eye's natural response to some form of irritant and are attempting to wash whatever irritant is bothering them. When excessive tearing, known as epiphora, reaches the point at which it has become chronic, this excessive quantity of tears can become a breeding ground for a variety of bacteria and yeast, which only serve to make the problem worse. In time, a red stain caused by a pigment called porphyrin begins to form under his eyes.
While the staining itself is not likely to cause your pup any lasting problems, it can be a symptom of a serious medical condition. Be sure you take your pup into the vet's for a complete checkup before you embark on any course of treatment to rule out any underlying medical causes. Beyond this, make sure you keep your pup's eyes clean using a warm washcloth or cotton ball soaked in cooled water that has been boiled.