It is unclear as to whether this breed makes a good guard dog. It was also used to herd cattle and as a protection/guard dog. He leaves with his dog, who has killed the guard dog. He was used as a messenger and a guard dog. Nowadays it is used primarily as a livestock guardian dog and property guard dog. The Neapolitan Mastiff or is an Italian breed of large guard dog. It is identified at the British Museum as a Molossian guard dog. The Rajapalayam is a formidable guard dog. Hades was often portrayed with his three-headed guard dog Cerberus. Their trusting, gentle disposition makes them a poor guard dog. Daniel buys a shotgun while Lacy buys an aggressive guard dog. It is easily trainable and often used as a guard dog and police dog. He returns and shoots the guard dog, freeing everyone. The breed was created to be a great guard dog. It has also acted as a guard dog barking at any strange person or animal.