So my government class was talking about ways to prevent burglars and my teacher said that one of the best ways was to have a large dog and a small dog. Now it got me thinking - I know no dog is guaranteed to protect me, but in a year or two when I'm living by myself as a single gal I would feel much safer with a guard type dog. Please understand that even though I intend this dog to be for a specific purpose he will be loved and spoiled just as much as my other pets. So I would like some information on good guard dog breeds now I also realize that every dog is an individual, but still I want to know which breeds are more prone to what behaviors and would generally make better guard dogs. I have a 14 lb boston terrier that sounds the alarm when anyone pulls up and goes after anybody she perceives as a threat but I would like a dog that was a little more threatening and could do a little more damage if need be. I am particulary interested in dobermans and bullmastifs. not to offend anyone but pitbulls aren't an option.