You need to first decide what exactly the purpose of the dog is. Watch dog or a Guard dog. They are too different things. Please also keep in mind that any Guards dog breed, requires proper training and continous re-enforment of commands and training. They also have an independent streak which is there in all guard dogs due to the nature for which they have been developed over hundreds of years. Do proper research on the breed and its requirements, otherwise you may be holding a tiger by the tail.