I think it might have to do with the severity of the bite. Sometimes if someone gets bit separating dogs that are fighting, the dog doesn't automatically get put down.
But, if you have a 120 pound dog, then you have to be better than leaving it in a fenced yard. No way do you leave it in a yard, and then leave the premises. She should get a healthy fine, and be responsible for vet and hospital bills of all parties.
I hope they don't kill her dog. If there was even one dog-at-large charge against her in reference to the Neopolitan Mastiff, then it would be a different story. If the mastiff left off attacking the dog, and attacked the owner with several bites, then put it down.
A good lawyer with experience defending dog owners should be able to prevent euthanasia, I think.
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