All these are signs that Maggie was trying to 'calm' the Boxer. I would show this film to AC and give them the info on the Boxer and the owner (tag # ect) then I'd find a different dog park to go to.The Boxer was standing straight aimed at Maggie where as this can be interpreted as direct intent of aggression/intimidation.
Maggie was standing side ways to the boxer, cow eared (not alert or aggressive), tail raised and wagging slowly (unsure), the moment before the boxer attacks her she even looks away from the dog, and I could only imagine she then probably showed the boxer the whites of her eyes (another sign that she is unsure and not a threat to the boxer.)
After the fight, Maggies back is facing the boxer, she is beaten and she knows it, she does not want to fight or defend herself.
That is exactly right! Nice to see some others with a good head on their shoulders, at least in this regard.All these are signs that Maggie was trying to 'calm' the Boxer.