What is the functional explanation for the Bergamasco's typical reserve around unfamiliar people?

Answer

Watchfulness; they observe, process, and then decide on a conservative response

Their reserve is a calculated assessment by a capable guardian; they observe and process the visitor's demeanor and intent before deciding on an appropriate response.

What is the functional explanation for the Bergamasco's typical reserve around unfamiliar people?
DogbreedintelligenceBergamasco