In the eyes of a dog, a person who is friendly to it is equivalent to its best friend or parent, a person who can give it a sense of security and allow it to cuddle up.

Analyzing from the perspective of color, humans have no color in the eyes of dogs, because dogs The eyes cannot distinguish too many colors, and dogs usually see people or things as gray in their eyes. In addition, a dog can tell whether a person likes it from the eyes of a person. When it feels that others like it, it will show special happiness, wagging its tail, licking people and other behaviors. Moreover, dogs can read people's emotions. When people who are kind to them are sad, dogs will also comfort people's emotions by cuddling close to them.