German Shepherds are often pictured as guard dogs. These easy-to-train canines are loyal, have high stamina, and are good under duress.
They may not be the tallest species at just 65 cm, but they are highly muscular and powerful. It is also a submissive pet until provoked.
They are extremely curious and suspicious, making them excellent for warning you to any risk posed by a stranger whose appearance or odor they dislike.
As it was bred to guard huge estates, the Bullmastiff is a natural guard dog, but if properly socialized and taught, it is calm and relaxed with its owners.
The innately aggressive nature of the Doberman has been bred out, resulting in exceptionally friendly family dogs with the potential to protect.
Giant Schnauzer is the Miniature Schnauzer's bigger cousin. These dogs were bred to herd cattle, so they're inherently fearless and can face up to larger animals.
If you take your time when introducing kids to friends, they will quickly learn who is trustworthy and who isn't. They are naturally suspicious of people they don't know.