Ya, have two GSDs, and a big mother fucker of a Rottweiler, even I think twice going into the garden at night, they are very protective of there garden, only me the wife and kids can go out there, if someone visits we have to put them in the dog run, if we leave them out the Rottweiler tries to ram the back door with his head with a view to ripping apart whoever is visiting, pitty any fool who tries to rob my home,