>>#2, >>#21, >>#3, The dog tried biting both of them, and the second one landed. Life isn't a fairy tale where all animals are nice and cooperate with humans
She had just fully gotten loose from the fence at that moment, so maybe something cramped or pinched with the final push, and she naturally wanted to lunge towards the source of the pain.
You can see the dog snap at the people in the third frame because she's scared. Any animal does that when frightened. Judging from her emaciated body she must have been like that for at least three months with minimal food.
Suppose you could have just tied a rope around her snout or whatever a dogs mouth beak is called then pulled her free without worrying about her biting like she tried to do