This dog didn't have a history of biting. It spun around as if to bite once.
The proper quote is "The dog then “whipped around to bite me,” This was when she intervened after the dog killed the chickens.
If you believe that killing chickens and attempting to bite its owner is acceptable behavior from a dog, then there's no sense arguing with you anymore.
There's many folks here who accept the reality that owning such a dog is a recipe for disaster.