My Heeler is pretty cautious but friendly with strangers. It often takes a few minutes for him to warm up, but once he does, he’s all about making new friends!

Mine is usually reserved around strangers.

My Heeler is very alert and can be a bit standoffish with strangers at first, but after some proper introductions, he warms up quickly. It's part of their herding instinct to be cautious, but he's incredibly loyal once he trusts someone.