The problem is sourced back to the poor handling by the Bull Mastiffs owner. It is unfortunate for all parties involved. The details of the attack are not given in the story. I hate to see a dog punished because of the owner's actions BUT if it was my dog being attacked, there would be no hesitation to stop it as quickly and effectively as immediately possible. This is a sad story on all fronts.
Sic Semper Tyrannis