When I was growing up, a hundred or so years ago from when I currently am, I used to love seeing a beware of dog sign as it usually meant there was a big floofy slobberdoodle looking for scritches on the other side. I have yet to meet a security dog that couldn’t be tamed with a little baby talk and a pocket snack.
I can’t say the same for these new ‘guard dogs’.
I put up the same sign and pipe faint whirring sounds thru a speaker. Much cheaper and works just as good.