What major role was the Giant Schnauzer bred to take on, differentiating it from the Standard Schnauzer's role?

Answer

Managing large cattle herds and serving as estate guards

The Giant Schnauzer was bred to manage large cattle herds moving to market and to function as a formidable estate guard, requiring greater mass than the Standard.

What major role was the Giant Schnauzer bred to take on, differentiating it from the Standard Schnauzer's role?
OriginDogbreedSchnauzer