The age at which puppies are separated from their mother and littermates has profound effects on behavioral development and lifelong welfare. Evidence supports 8 weeks as a minimum age for separation.
Early separation from the litter is a preventable cause of lifelong behavioral welfare problems. Puppies taken away from their mother before 8 weeks are deprived of critical social learning that cannot be replicated in a human household. The behavioral deficits that result — increased fearfulness, difficulty reading dog social signals, poor bite inhibition — cause chronic welfare compromise for the individual dog and challenges in every context they encounter other dogs. Responsible breeders who keep puppies with their mother until at least 8 weeks, provide appropriate socialization, and ensure the litter environment is enriched and low-stress are making the most important welfare contribution of their role.