All you people defending this guy have no scope of the matter. I am a neighbor and this guy has been terrorizing the area for yrs. If you were here in this nhood you would be singing a different tune I guarantee.
Furthermore,  killing the neighbors pet because of boundary issues is ridiculous.  Has anyone ever thought of knocking on the door and talking with someone and figuring it out? Or is "just kill it" is all you can come up with?  The man is a psychopath. Why don't you come up to his house on s4th and d and look at what is on his fence.