The guy's a friggin idiot. He has demonstrated he can't control them.
Attacks by dogs on other dogs are really not taken seriously enough.
As a teenager a Rottweiller attacked, eviscerated and killed my pet collie cross dog. The owner walked away scot free.
If they attack a dog, they could attack a child, the lack of control and poor temperament being common factors.
Idiots like this make my blood boil.