Because of their loyalty and protective instincts, several dog breeds are perfectly suited to be guard dogs for their masters. Whether you live in a dangerous or isolated area, or simply want the added safety of a comforting watch dog, the below breeds have proved to be some of the most reliable guard dogs. The dogs usually have strong instincts about when there may be danger or an untrustworthy stranger approaching. They may be trained to alert their owner about unusual activity in their area, or be able to signal whether or not a strangermay be a friend or foe. Guard dogs also can be trained to protect and defend their owners, by attacking, biting, or putting an intruder in a hold, the moment their master gives a command. If devoted to diligent training, there is almost no limit to what these intelligent dogs may be able to do. As with any investment, working with your guard dog may one day ensure the safety of you and your family.