What is roof of dogs mouth black smart?

The roof of a dog's mouth is called the "hard palate," and it is typically pink or light in color. However, some dogs may have black spots or pigmentation on their hard palate, which is usually a natural variation and nothing to worry about. Additionally, some dog breeds, such as the Chow Chow, have completely black hard palates. This pigmentation is believed to be an adaptation that helps protect their mouth from the sun's harmful rays. It does not necessarily affect a dog's intelligence or behavior.