The developmental tasks of this period all involve learning appropriate social behavior with other dogs. Orphan puppies and single-pup litters are at a disadvantage when it comes to learning how to be a dog among dogs. Orphan puppies, especially those bottle-fed from a very early age without mother or siblings, make very problematic pets without knowledgeable remedial behavior shaping. 7-8 weeks Ideal time for going home. This is the very best age for forming strong bonds with people.
Puppies are mentally mature enough to adjust to changes, and to begin their training in manners.
Object-associations formed during this period leave indelible imprints. It's vital that the puppy have as many positive experiences with people, other animals, and novel situations as can be arranged. It's equally vital to avoid painful or scary experiences until after 11 weeks. Make sure all training sessions are fun and successful. Get the puppy out into the world and expose him to as many new things and different ages, sexes and races of people as possible.