Do dogs understand human nature?

Dogs understand human nature. Research shows that dogs can sense emotions from human voices and respond accordingly. Dogs are also very smart and know how to use their eyes to avoid being held accountable by their owners when they make mistakes. Therefore, as long as the dog is treated well, the dog will repay the owner with its own abilities and bring happiness to the owner. As can be seen in the famous movie "Hachiko", dogs are very humane. Although the movie is exaggerated, Hachiko also has a true story to be found. Dogs take the most serious attitude towards their owners' loyalty. In real life, you can also see how many dogs help humans, such as search and rescue dogs, tool dogs, etc. By getting along with humans for a long time, they also know what humans need and what they do will make humans happy. Therefore, dogs are humans’ friends, and treating dogs well is also being kind to yourself.