In Nebraska Revised Statute 54-404, who gets to carry out the execution of the stock? Bwahahaha.
It is my understanding in states with "open range law" as I believe we have here in Colorado and in Wyoming, it is up to us to fence our land to keep another's livestock off. I believe this applies to property in rural, non-incorporated areas.
The Nebraska laws seem a fair way to go, creating responsibility on the part of the livestock owner.
A man in our neighborhood shot and killed a trespassing bull that had crossed hi fence to get to his in heat heifers. He is now going through the lovely mess in court, to the tune of several thousand dollars. I know nothing of the backstory of the trespassing bull.