"Careful socialization" refers to the deliberate and thoughtful process of teaching and exposing individuals to social norms, customs, and behavior so that they can interact effectively and appropriately in society. Full definition
They could be cautious around strangers and could need careful socialization to avoid or reduce defensive competitive tendencies. (notinthedoghouse.com)
Sadly, many of these dogs had the capacity to become happy and confident, if only they'd experienced careful socialization in their early weeks. (bracpet.com)