What aspect of the Catalan Sheepdog's temperament often manifests toward strangers?

Answer

A degree of reservation or wariness toward strangers

This is a common trait found in guardian and herding dogs bred to be discerning about their surroundings, resulting in a reserved nature toward people they do not know.

What aspect of the Catalan Sheepdog's temperament often manifests toward strangers?
rarityDogbreedHerdingCatalan Sheepdog