I agree don't shoot the dogs it's not their fault. Deal with the owner in any legal way you can. It might cost some lawyer fees but that may end the problem when he is facing a few $1000's in law suit. I would advise that for $150.00 most lawyers would send the person a notice of potential lawsuit pending another dog incident. Have them clearly outline your position regarding trespassing and hunter harassment. I'm sure that they would state current law statutes and probable suit filing. This most likely would do the trick. Good Luck.