I briefly owned a large German Shepherd many years ago after getting out of the service. Although a well trained dog, he was so intimidating looking that my vet was afraid of him. I gave him back to my sister who at that time raised German Shepherds used by the OK State Police.
I don't want a dog for protection anymore, just one that will tell me if someone is around that shouldn't be. I have a 38 special that should adequately protect both of us.
Muleteam1