Stories and people like this get me good. I'm sorry but I am an owner on both sides - I have chickens, and I have dogs.
I know I have an escape artist of a dog, I have one a chow/shepherd mix who because while shes a great dog, shes a fierce protector and absolutely hates my neighbors who live beside me - I know its the guns and the trucks, she always has the biggest fits then, and also I think its their drinking. Both my dogs get aggitated when the neighbors throw a party and they are drinking next door. ANYWAY - My escape artist is on a heavy duty chain (When I'm not home and they are outdoors or I'm expecting someone to come out that the dogs aren't familiar with) and in an underground fenced area. (we're putting up a 6 ft fence soon just havent had the funds to fence in a full acre like we want to yet)
Shes gotten loose a few times, but each time she has we're right behind her chasing her. - 3 days ago she got loose for the first in months. I followed that dog barefoot through fresh cut hayfields resulting in my feet being cut to bits and sore even now - just so I knew she wouldn't get into nothing. (shes known to chase cars, poultry, livestock, and hates the hunting dogs down the way - never hurt nothing but still I want to make sure)
I have chickens, and darn right I catch a dog that is chasing my chickens, trying to get into my coops, or god forbid actually killed a chicken here and its dead. simple. I have a 1 chance and 1 shot rule. dogs who aren't seeking to hurt anything get 1 chance for their owners to keep them away. when they come back the 2nd time, or a dog who is actually in the pens/coops/killed a chicken, they are getting 1 solid shot from my rifle and then drug out into the woods for their burial. or if they killed something, and the owners have been warned before - I call the owners and the dog's body waiting for them.
I know if one of mine was shot for being up to no good, me, my family and my 6 yr old would be devestated however I'd hold not one grudge about it if the dogs were bothing anyone or anything. Why? Because I as an owner didn't do MY job, and I'd be mad at myself for failing MY dogs, not at the owner/neighbor who did what was right by their property and animals.