The default eye color for dogs is brown. Genetics, pigmentation, and health issues can all play a roll in altering the color of their eyes. We’ll look at the most common reasons your pup has blue eyes. The Merle Gene can cause pigment dilution on the nose, eyes, and fur. Heterochromia literally translates to two different colored eyes. This can be caused by the Merle gene, loss of pigmentation. Albino dogs, also known as C-series, show a massive loss of pigment through their entire body, also resulting in a pink nose andblue eyes. [Read More]