how old is a puppy before it goes to a new home
Bringing your new puppy home before 8 weeks of age will interrupt this critical period of development and most likely will lead to socialization and aggression issues in the future. 1  Birth to 8 weeks that a puppy spends with the littermates is the backbone of their lifelong character! The socialization with litter mates and/or other animals is crucial from the age of 6 to 8 weeks. A puppy that is younger then 8 weeks old is not fully developed in nerve stability and social behavior.