Not just no, but heck no.
If someone lets their animal off leash they're subjecting them to whatever horrors might be perpetrated on a loose dog. Be it traffic, wildlife, crazy mean people, farmers protecting their livestock, etc.
If a loose animal's actions put it in danger that does not give the person who chose to let their dog run loose the right to use lethal force to "protect" it. The time to protect it was back when they made the decision not to put that leash on. And I don't care whether it's attacking a dog, a horse, a pig, duck, whatever (my old muscovy duck's sire killed a GSD that was mauling his hens and the dog's owner tried to sue them ).
If someone lets their animal off leash they're subjecting them to whatever horrors might be perpetrated on a loose dog. Be it traffic, wildlife, crazy mean people, farmers protecting their livestock, etc.
If a loose animal's actions put it in danger that does not give the person who chose to let their dog run loose the right to use lethal force to "protect" it. The time to protect it was back when they made the decision not to put that leash on. And I don't care whether it's attacking a dog, a horse, a pig, duck, whatever (my old muscovy duck's sire killed a GSD that was mauling his hens and the dog's owner tried to sue them ).
While it's a tragic situation for all involved. The person whose dog was off leash is to blame. point blank.
You let your dog run loose..you are accepting the dangers that come with that. Other dogs, traffic etc.. and if your dog attacks another, what that owner does to your off leash dog, is still your fault frankly.