I have a 5-month old gsd puppy. So far I have trained her the basic commands like sit, come, lay, etc... I am debating whether I should train her to be a guard dog. Although she is a biter (excessive chewing at the moment), she is not aggressive at all. The reason I want her to be a guard dog is because about a year ago, the house next to us was converted into a drug rehabilitation center for teens. There are some very troubled teens out there and I am worried about the safety of my family; however, I don't know if training a gsd puupy to be a guard dog is a good idea. So my question is: Should I train her to be a guard dog or let her become naturally protective of my family? Any input would be helpful. Thanks.