Create rules in your home for your German Shepherd to teach her discipline. She will need this in order to be a good guard dog. German Shepherds respond well to this type of training and enjoy pleasing their owner. It shows that you expect her to behave. Some good house rules include no begging during meal times, staying off furniture (get a dog bed for your German Shepherd), no jumping on people, and sitting before playing with a toy.
German Shepherd - Dog Lover