When it comes to how long the puppy protection among dogs, it is important to first consider another thing: The unconditional consideration for a puppy is only within his own pack and not when meeting other dogs.
In principle, the subject of puppy protection is not too relevant for the owners of a new puppy. Apart from the fact that small dogs enjoy this protection anyway only in their dog family - so usually with the breeder - the dogs are, if they move into their new family, usually already too old, in order to profit from it still.
That's how long the puppy protection is
So that puppies still enjoy a puppy protection, they must not be older than approximately 14 weeks, thus something over three months old. From an age of about eight weeks, however, it may happen that an older dog from time to time the overbearing young pound in his place - of course without biting the physically inferior dog. But at the latest after the first 14 weeks of life then expect the relatives of the puppy, that the young dogs now stick to the rules of dog behavior.
Protection only in your own pack
The puppy protection is misunderstood by many people as free license of a young dog. Because older dogs take care of him, nothing could happen to the puppy, even if he is too impetuous or intrusive. But since the puppy protection is a behavior that is the conservation of species within their own breed, only the dogs from one and the same pack by nature take into account the little ones - that does not mean, of course, that most four-legged not educated and socialized well enough are to spare a puppy a bit.
Beware of foreign dogs
That is why it is important to take good care of the young dog, to socialize and educate him well. Even if your dog still enjoys puppy protection, you should be careful outside or in dealing with foreign dogs. Some puppies go through the world as if they belong to them. This can be a stranger dog on the dog meadow or the street ever before properly go against the grain.
So that your little ruffian is not overwhelmed by a charging adult dog and gets scared, you should always ask the owner or holder of the other four-legged friend if it has experience in handling puppies in dog encounters for safety. Injured dogs are very unlikely, but not excluded.
For aggressive, very rebellious stranger dogs, it's best to go straight to avoid a dog fight between him and your puppy. Because again: puppy protection is not a free ticket.