I am a dog lover but sadly the only thing for that dog is to be put down.
The owner fined/jailed etc
Bully breeds banned. Owners fined. Dogs confiscated.
Paying for a dog license could generate money for dog wardens.
I walk my small dog in a park like place with a path down the middle-not open to traffic but is open to horses. There are single horses, horse and carriages and large groups of horses training.
As soon as I see one I put my dog on the lead. There is a danger to her, the horse, the riders should the horse throw them and if they then bolt to anyone in the cart or in their path.
I feel awful for those poor horses and the riders did so well. As did the members of public who tried to help but the gormless owner surprisingly
did nothing.
And why risk letting that dog attack again?
Next time it could be another dog/child/person who gets attacked.
Not worth the risk.