The most direct way for dogs to express their emotions is by barking. It is said that wild dogs cannot bark, but domestic dogs can bark. Therefore, if you carefully observe the dog's expression and movements, and pay attention to the sounds the dog makes, you can definitely guess the dog's will and psychology.

When a stranger comes in or approaches the kennel, the dog will bark vigorously. Two dogs generally don't bark much when they meet on the road. It can be seen that dogs usually only bark within their sphere of influence.

Generally, small dogs have a high and sharp bark, and they like to bark randomly; large dogs have a louder and deeper bark, and have a calm temperament, and usually do not bark randomly.

A dog's barking and vigilance are necessary conditions for a watchdog. Dogs are good at guarding the house. When they see strangers, they bark immediately. This is the language of dogs, and barking is a warning. Awaken companions to pay attention and tell the owner to be vigilant. The cry is also a kind of demonstration, with the effect of encouragement and intimidation. When the same species is far apart, they also use calls to communicate with each other.

For the weak, dogs also have a growling sound that expresses authority. When hunting dogs, they are most likely to make this sound to express authority and intimidation. When a dog is bullied, it will make a whining sound of "oooh...ohoh". Puppies will make a high-pitched sound when they are away from their mother, feel cold, or have abdominal pain due to parasitic roundworms. Dogs will also moan when fighting or expressing resentment, which is a sound that expresses disgust or anger. In addition, when a dog feels sad, it will also make a nasal sound, which means "sad" and "no way".

In addition, dogs also make different sounds when they are in a happy mood and rub their cheeks from time to time.