For home get a decent size dog with a loud bark. Then the bad guy will go next door. Get a yip yap dog and a gun even. But you do not want an attack dog.
No i dnt want an attack dog, n ur right apperance is everything i let my dane out on a chain in front yard to eat n she scared off all the football runners n reg joggers lol cause there all scared of her hell one day she broke her chain ona jogger boy was it funny they were scared chitless but all she did was slobber on him