Same here. I think it's like that most places. If any predator comes onto your property and attempts to go after you or your animals you have the right to shoot.
I am so very sorry for your loss. How devastating. Like you, I would pursue this to the fullest extent of the law and not give up. The idea of a trap in front of the pen is really good. IF I were to catch the dog, it would be dispatched permanently.
Boom.
We had 2 unleased, uncollared local...