Similar to children's learning knowledge, dogs also have the best time to receive training. For most dogs, training before the age of 1 is crucial. Puppies are weaned 45 days after birth, and they can start training some simple passwords by 3 months, such as holding things, smelling things, standing up, lying down, saluting, etc. Puppies may not do well, but the conditioned reflex training of these basic actions and passwords is the basis for further training in the future.
Small dogs have grown to physical maturity by more than one year old, while black bay dogs. Large dogs such as Dane and Saint Bernard don't mature until they are 2 years old, but 1-year-old working dogs are able to take part in "work"; The 1-year-old companion dog should also be able to perform many common actions.
Dog training is staged. Don't test the dog's skills too early, especially the fierce biting. Let the dog obey orders and become a well-trained working dog or a lively and intelligent ornamental dog.