1. Fungal infection or other skin diseases

2. Genetic genes

If the color fades unevenly, the dog still scratches with its paws, or likes to rub its nose (or face). Go to the hospital.

If it is caused by skin diseases, treat it early and properly, and the color will slowly recover when you get well. If the skin disease is delayed or the drug treatment is improper, the damage may be irreversible.

If skin diseases are ruled out, there are only genetic reasons. The dog's melanin is insufficient or unstable, and it will fade sooner or later with age. Some began to fade one or two colors, and some stopped shortly after birth. Some retire more, while others retire less. These are all determined by genes, and no effort can change them the day after tomorrow.

Of course, with the change of seasons, the color of the dog's nose also changes, usually a little lighter in winter and a little deeper in summer. But the influence of seasons is far less than that of genes. Therefore, the so-called eating something or getting more sunshine is just self-consolation.