What characteristic related to their historical development contributes significantly to the breed's rarity outside its native region?

Answer

Their existence was historically tied to a specific agricultural need in a defined geographic region

Because their historical purpose was directly linked to agricultural needs within the defined geographic region of Catalonia, their numbers naturally remained limited compared to globally distributed breeds.

What characteristic related to their historical development contributes significantly to the breed's rarity outside its native region?
rarityDogbreedHerdingCatalan Sheepdog