How does a Border Collie act toward strangers?

A Border Collie’s attitude toward strangers is usually friendly and affectionate, because it is a very social breed that likes people, has little guard against humans, and tolerates children well. However, this does not mean it has no alertness to all strangers; it keeps some vigilance to protect itself and its family.

In addition, the Border Collie is highly intelligent, so it may judge a stranger’s character by details, and thus show different attitudes toward different strangers.