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The Rottweiler is an excellent service dog breed. There is a saying about them, "If you trained a German shepherd, you did nothing, and if a Rottweiler, then a lot." This speaks of a strong and complex temperament. "Butcher's dog" as it was called, bred for driving livestock, used in the economy, to guard the house. They also say about Rottweilers “a dog of one owner”, they can hardly stand a change of owners.