The three colors are divided into three colors with yellow heads and three colors with black heads. When they are born, they are almost only black and white. From the age of more than one month, you can tell whether they are yellow heads or black heads from the ear hairs. After two months, they start to change. Lanugo, yellow hair will gradually grow out to replace part of the black hair.
In addition, the easiest way to judge whether a Corgi is pure or not is to pass the relevant pedigree certificate or see its parents. Generally speaking, If the parents are pure, the offspring will also be pure.