Glad your girl turned up safe and sound!
I hate people that don't tend their dogs. We never leave Sadie Jane unattended. We have a neighbor that has several dogs. They keep them all in the house, but let them out unsupervised. One day, earlier this year, the two largest came to our yard...again. I tried to run them off but the largest one turned aggressive...head down, hackles up growling and snarling. I got away from him and got in the car to drive to the neighbors. As I got there, I could see that the dog had Dew cornered in the back of our yard. I beat on the neighbors door and in none to polite terms to him to get his dog RIGHT NOW, or I would be happy to dump it's dead body on his porch.
He called the dog off and I went home, furious as could be. Later that day the neighbor came up to try to smooth things over. He actually said to me "I understand you were upset, but the dog won't bite. You didn't have to act that way." I said, "Let me make this clear. This is my yard. If your dogs ever come into my yard again, and show even the slightest aggression I will kill them on site."
So, what does my neighbor do? A few days later a buddy of mine and I are playing horseshoes in the field. The neighbor brings his dog over to show me "See? He's not aggressive." Meanwhile his dog goes and takes a crap in my yard, and pees on everything he sees. I told the neighbor to get his dog out of my yard, or face the consequences. He then blamed MY dog for all the problems! His reasoning is that I own a female dog, so that's why his dogs are always coming around. I told him the real problem is that he doesn't control his own dogs.
We have been neighbors for years, so he knows I'm serious. I told him that first day, that the only reason his dogs were still alive was because we were neighbors and that he wouldn't get that courtesy again. When we first moved here, one of his dogs attacked my daughter, knocked her down, bit her ankle and tried to drag her into it's doghouse. Elizabeth was only 8 years old. Fortunately, another guy that was present saw it happen and got the dog off of her. I was furious, but couldn't kill the dog because it was chained. I was more ticked at the neighbor for not telling us the dog would bite. He had invited us to his house for a birthday party. A little warning would have been nice. I also had to blame myself for not watching my daughter more closely, but I had no reason to believe there was a vicious dog in the yard with so many people around.
I don't relish the thought of shooting a dog, but when it comes to protecting my family or even my property/chickens, it's a no brainer.