I don't have a dog but 3 of my children do
One has a staffie-he hates the postman and will do his big,deep bark from the other side of the door-I've had him to stay a few times and when the postman comes,he goes mental until I open the door
If someone broke in,he'd bark but as soon as they whip out the treats/belly rubs he'd lead them to the best stuff and hope for more treats/belly rubs on the way out
He's such a wuss-my son lives in a ground floor flat and one night,a pissed up idiot thought it would be funny to bang on all the windows as he staggered past-this was about 1am
This woke my son up,who went to have a look at what the hell was going on-the dog hid behind my son-but did bark once or twice!
Our friends dog is just as daft in his day to day life,but someone did try to break in once and the dog just went mental-if he hadn't have been stopped by his owners,he would have had them
I have been known to walk him down the street and he's taken a dislike to someone,and let the whole world know
He's so protective of them-hes staffie/whippet cross
My mates dog wouldn't even bother to wake up-staffie
I've gone round many times (I have a key and shes asked me to) and have had to wake him up just to let him know I was in front of him!