When I started delivering on my first trip there was a section of town that was called Dog Hill.
The sup that trained me was even kind enough to point out the homemade sign in the first block.
I was only bit once and it was by a St. Bernard. Many dogs tried but none were successful.
3 or 4 dogs tried to attack my package car and lost. One time I had a sup on car when the dog ran under a rear tire, the dog was still alive but barely. He told me to back up and finish it off. I did the deed as instructed. No collar, no license or tag, we finally found someone who told us who it belonged to and they said thank you.
I know you could not do that today.