she tried to help an injured dog and it bit her
you better be pretty familiar when approaching a wounded dog
been there done that
The article does NOT say she tried to help the dog, nor does it say she tried to approach the dog. Where did you get that info?
It sounds like an unfortunate series of events, but the owners of the dog are liable, IMO.
Even if you are very familar with the dog, when they are injured there is an increased risk of being bitten - pain will cause otherwise unexpected reactions.