It will shape his entire future/life. How he will react and deal with things as an adult dog.
Expose him to a great variety of things-in a gentle way-.
Take him car riding, go to places, expose him to a lots of people, animals, and other things.
Proper socialization can prevent him being fearful of children, car riding, and in general: other people.
Help him to develop to be a nice pleasant-mannered Papillon.
