What would you do ?

[LoneWolf]

So, your dog wandered onto his property with no incident and then his dog follows your dog onto your property and your grandson’s dog decides to kill it? Did you have your grandson’s dog euthanized? Did you or your grandson offer to pay for a new dog when/if he decided to get a new puppy?

Your answers to these questions will determine who the asshole is in this scenario. Right now the odds are definitely tipping to show you as the asshole.