Shooting a dog just because it is on your land is a criminal offense. He said that he told his guys to shoot any dogs they say which would be a crime. The discussion that plans out a criminal act is called conspiracy. That is a separate criminal offense in itself and charges can be brought even if they never actually commit the criminal offense that was discussed. So the man and who he talked to may have already committed conspiracy. Allegedly. I think you should report that to law enforcement.
I expect my dogs to do their job and they expect me to take care of them with the same level of commitment they show me. The best way to win a fight is to let someone else do the fighting.
