Good dog!!!! Funny how the Dane was quite friendly with the guy...and when the owner screamed...it turned on him! I know that my girl would NEVER let any stranger into our house...or even get out of their car in the driveway. She is so suspicious of everyone...only her family, and a few close friends. But that also makes her a liability and I do not set her up to fail.
There is another video from a few years ago which I cannot find. It was from a break-in where the owner was not home but the rottie (female) was. The rottie was not very forgiving, let's just put it that way.