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You would think having a German Shepherd it would scare strangers away lol

For total security you need a German Shepard and a Chihuahua. A Shepard to take care of scaring off any strangers, and the Chihuahua to wake up the German Shepard.

Haha I think you may be right :)

She is an intimidating dog and does not warm up to strangers quickly. She never even heard the woman come inside!

She must have been really quiet