Why some ferrets have a white stripe on their faces?

The white stripe on some ferrets' faces is primarily due to their genetic makeup and can be a characteristic of specific breeds or color patterns. This stripe often results from a combination of the ferret's coat color genes and the distribution of pigments in their fur. Additionally, the stripe can serve as a distinguishing feature among ferrets, contributing to their unique appearance. Breeders may select for these traits, further influencing the prevalence of facial markings.