Often mistaken for GSD the mallinois are most common US police dogs. They can be exceptionally trained. They have keen intelligence, and are eager for being rewarded. Worldwide this breed is used for police and military forces.
Other than these breeds many other dogs prove to be perfect watch dogs. For example, Belgian Malinois, Wolf dogs. All of them can be your most faithful companion throughout life. They are born to adapt anything that is trained to him. Small dogs with ill training can turn out to be dangerous. They behave according to your behavior towards them. You must be patient and affectionate to them. All they need is love and care.