Everyone makes personal choices and I respect yours. However, my experience is different. My dog has a keen protective drive. He lets me know if trouble is in the vicinity long before I can see it. He also provides an additional deterrent in the urban environment. Why mess with a 90 lb. GSD with big teeth if there are easier pickins elsewhere. I'll gladly haul around a few pounds of dog food in trade for that any day of the week.

Craig.