Why is my dog's fur changing color from white to brown?

There are several reasons why a dog's fur may change color from white to brown. One common reason is natural aging, as some dogs' fur may darken as they get older. Another possibility is exposure to sunlight, which can cause fur to lighten or darken. Additionally, certain health conditions or dietary factors can also affect the color of a dog's fur. If you are concerned about the change in your dog's fur color, it is best to consult with a veterinarian for a proper evaluation.