Are small dogs dumi?

Why small dogs are so dumb! Small dogs can't be trained! It's a small dog that he can expect from him. Do you also teach small dogs? These are the questions or statements I have to hear quite often. And there is nothing to pretend. When walking down the street, the park is visible quite often when visiting public events that small dogs are much more unobtrusive, louder and stressful than large dogs. In this video, let's try to understand why it is, what and whether you can do something there.