Dogs are derived from wolves, with a history of more than 10,000 years. There are two theories about the origin of dogs. One is that all dogs in the world are derived from one kind of wolf, and the other is that all dogs in the world are derived from one kind of wolf. They come from different breeds of wolves. Both theories need to be verified. In short, dogs are loyal partners of humans and are loved by most humans.

Tips:

Because dogs are derived from wolves, they will have many wolf habits, such as liking to dig dens, barking, living in groups, and having a sense of hierarchy. Parents should pay more attention to them. learn.