Why does Teddy's fur turn white?

Teddy's hair turning white may be caused by genetic inheritance, older age, or malnutrition. It is a very common phenomenon and generally does not affect the dog's health, so there is no need to worry.
Tips:
Usually pay attention to the dog’s diet, give the dog some egg yolks, seaweed, lecithin, hair beauty powder, etc., pay attention to hair care, so that the dog Dog hair is less likely to fade.