In a pack dog group, the puppies stay with their mother at least until they are six months old. In the pack dog group, there are aunts, i.e. those dogs that help the mother dog during the education period. So, the puppy is also educated by them. We should consider that in a pack dogs there is no one who dominates because the pack of dogs is structured on the concept of roles and cooperation.
But you adopt the puppy between eight and ten weeks to get it used to all the stimuli in the city. Adoption can not take place at the age of six months because late exposure to environmental stimuli can have a negative influence on the puppy’s behavioral development.
A puppy grown in the countryside up to the age of 3 months will have great difficulty adapting to life in the city and may become phobic of, for example, noises, cars, cyclists and may decide it does not want to leave the house. This happens precisely because environmental socialization has not been considered from 8 to 10 weeks.
On the other hand, early adoption (before 8 weeks) can be destabilizing for the puppy because you take him away from his environment and siblings at the time when he needs them most. And you do not give the puppy a chance to identify with the species it belongs to, i.e. other dogs. When this does not happen, the puppy may manifest aggression in reaction to stimuli that are unfamiliar or otherwise recognized as potentially dangerous.
You should keep in mind that the mother dog not only feeds and warms the puppies but she is the first and best teacher for the puppy. It is crucial that the puppy stays with its mother and siblings for 8 to 10 weeks.
Furthermore, the mother is the element that creates the psychic container. This means that the more the mother is present, the more emotional stability the puppy experiences. If a puppy is emotionally relaxed, the more the puppy learns.
Then, the new family will expose the puppy to all those stimuli that will be part of its future life (sounds, noises, people, children, etc.). Of course, these have to be done in the right way and at the right time. Furthermore, socialization to stimuli should take into account the dog’s character and the breed to which it belongs.