Don't even think of laughing at his guard dog qualities. The Romans used to use them as camp guards. I brought two back from Germany and I can assure you no one would consider breaking in our house.
I had one like that back in the late 1960's and early 1970's, her name was Penny, she was one of the best dog's I ever had. I still miss her over 30 years later. Enjoy, you picked a real winner.
So are we going to see some more guns for sale from you, where you have gone to another form of "home security?" Congrats on the new companion! What does the cat think of him???