What dogs should a woman living alone get for protection?

A woman living alone can consider Golden Retrievers, Labradors, German Shepherds, Alaskan Malamutes or Border Collies - intelligent, alert breeds with high loyalty that will protect their owner. Note that German Shepherds are fierce and hard to train and Malamutes are large, so both are banned in many cities. Small dogs like Teddy, Pug or Papillon are also alert and will warn you of strangers.