This is a totally different situation, as I dont have proof of whos dog it is. Or if it is a dog, although the height of the marking I doubt its a tom cat.
The other, I did have proof, and took care of it using the legal means necessary. In the winter its not as much of an occurrence, especially this winter since its been so cold and with tons of snow, so not a lot out of outside activity. I cant go shooting a dog running down a public road.