If by chance you happened to get the dominant pup out of the litter, and believe me one was dominant, or you got the weakest pup in the litter ,does not enter into it at all. You have to show the pup you are the boss in this pack. You are number one. Every member of the family has to make this part clear. No one can let the dog think it is above any member of the family, if you do, that person will have no control.
Children have a way of exciting puppies.
The pup wants to play and he may play hard. This can cause some problems. The pup starts out playing and as it gets a little rougher he gets a little more excited. The pup will play for control, he wants to be able to dominate this other pack member. The child gets excited, and the pup gets even more excited.