IN CONCLUSION
When looking for guard dogs, you should be looking for big muscular dogs who display high energy, intelligence, and loyalty. Basically calm and low-energy dogs make bad guard dogs, they usually won’t take recognanse of strangers or threats around them. Labrador retrievers, golden retrievers, Irish setters, and Basset hounds would make very bad guard dogs just to name a few.
Here is a list of some dogs that would make good guard dogs: Chow Chow, Dogue de Bordeaux, Belgian Sheepdog, Belgian Tervuren, Tibetan Mastiff, Anatolian Shepherd Dog, Black Russian Terrier, Great Pyrenees, Neapolitan Mastiff, Fila Brasileiro (Brazilian Mastiff), Dogo Argentino, Tosa Inu, Bouvier des Flandres, Ca de Bou.