Fortunately, a lot of progress has been made in the last couple years. If in the past, you had to wait until the puppy were six months to begin the training, thinking that they were not ready before this period to face something as hard as the training, nowadays, thanks to new training methods and better understanding of canine psychology, it is possible to initiate the training of a puppy from the day it arrives home.
Most of the dog owners believe that training means teaching the dog to sit or lay, but truth is that a dog can perform these actions on its own and it doesn't need our help to do it. Training consists in teaching the dog a foreign language (ours) so the animal can understand what we expect it to do and when we want it to do it and consequently obey.
Training a dog also means to state what the dog is allowed to do or not do. From a very early point of their life (before the 18th or 20th week of life), puppies have little teeth that are like pins that fulfill a very important role in their training. In fact, playing to bite is not only normal in the puppies, but also very educative. The puppies, like little children, explore their surrounding world by introducing objects into their mouths. Any object that doesn't react when they stick their sharp little teeth in it should be inanimate and any object that shows signs of pain, should necessarily be, a living person or animal. dog harnesses
PLAYING TO BITE
Playing to bite teaches the puppies to moderate the intensity of their bites when they are playing with a living creature. If you watch young puppies playing, you will immediately notice that none of them get mad when bitten... unless the one that it biting has exaggerated the pressure. If this happens, the one that has been bitten whines with pain and refuses to continue playing for a couple of seconds. This is exactly what you should do if your puppy bite you too strong, so you will let it know that are has hurt and you are not willing to continue playing like that. dog rain coats
When your puppy hurts you with its teeth, you shouldn't look mad, just in pain (your anger would be interpreted for them as an incomprehensible aggression). If your puppy sticks its teeth into you, shout, turn your back to it and pretend that you are in such a pain that you can't continue playing. This attitude will impact the puppy the first time, but don't expect immediate results. Little by little, during the next weeks, the bites will loose the intensity until you will have to pretend to be in pain even with the softest pressure. Dog Training
Finally, begin to express pain with just the friction of your dog's teeth on your skin and the puppy will soon stop biting you. The dog must understand that it shouldn't bite a human, not even when playing.