I worked for a guard dog company for quite some time,
German Sheps are bad ass, but I have seen Rottweilers EAT DOORS,
THEY ARE SCARY, I have seen career guard dog people run like hell from them, u need a Rotty,good luck finding one that is not inbred and messed up in the hips, you want recent European bloodlines, they ain't cheap.
Forget the German Sheps and Pit Bulls,they are toast as a breed, the Germans have been selling their SECONDS to US police departments for 30 years,US German sheps are trash.
Rottweiler.