All dogs, big or small, are dogs and need training and socialization to integrate into human life. Many people keep puppies and think that it doesn't matter if the dog is so small, even if it is really bad-tempered. For example, many puppies jump up along their legs when they see people, and generally jump very high. The owner thinks it's cute, but it will cause pressure and impact to people who don't understand dogs. It is our freedom to have a dog, but the premise is not to cause trouble to the people around us. The owner can choose to let the puppy jump when he feels safe, but in case the opposite person is afraid of dogs or children, the owner must also have the obligation and ability to stop this behavior.
Dogs have no bad temper and must obey their leaders, that is, their owners. There are only two situations in the dog world. The boss is my leader and I obey him. Or I am the master's leader and he obeys me.