I'm not a big spanker for dogs personal reasons, but I have grabbed them a few times and put them to the ground. I had a dog (a Shepard) bleed to death when I was a kid because my step father side swiped him across the snout because he got up on the counter and took some food. I was in 3rd grade and have never forgotten it. I guess he hemmoraged. So instead for me they get a grab at the back of the neck.
Now kids, I think quite a few of them need a good swat!!