I noticed that Yuki’s fur is bicolor in some places — for instance, the tip of the hair might be black, while the rest could be white, or vice versa. I started digging into the topic and found a lot of interesting information on how this works. Humans, for example, don’t have this 🙂
It turns out that dogs only have two pigments — gray-brown (eumelanin) and yellow-red (pheomelanin). All other colors are formed through combinations or distortions of these pigments, regulated by genes. Pigmentation is formed by melanocytes. They can turn pigmentation “conditionally” on or off. The “rules” are in the DNA and can be activated by age or external factors (like how rabbits turn white in winter). The depth of color is determined by the concentration of pigments.
The situation where hair has different colors along its length is called agouti. This coloring, when it covers most of the body, is considered the original, ancestral coloring in dogs and is often called “wolf-like” because in wolves this trait is dominant and widespread. By the way, the Shiba Inu is the breed closest to the common ancestor of modern dogs and wolves. Caucasian, Central Asian, German shepherds, malamutes, laikas, huskies, Shiba Inu, schnauzers, Norwegian Elkhound definitely have the agouti locus allele, about the others I do not know.
And a few photos of Yuki 🙂 He generally doesn’t like being photographed, but I love photographing him, and he gives in












