Rottweilers trace back to the German market town of Rottweil, where drover dogs herded cattle and hauled butchers' carts before moving into police and search work. The result is a powerful, compact dog with a black coat, rust markings and a calm, watchful way of sizing up new people. Adults usually weigh 75 to 135 pounds, so size is part of daily life.
In San Bernardino, that strength shapes the routine more than the short coat does. A Rottie needs leashed walks, steady training and time with the family, and it does best on a schedule that avoids midday heat. Many are affectionate and goofy at home, though a protective streak means visitors should be introduced calmly. Dogs vary, and an adult Rottweiler's personality is often easier to read than a puppy's.