You're right - I know that you should never grab dogs that are fighting, but I'd do it rather than nothing everytime. When my dogs have been attacked, dog fights at work or the first time Connie attacked a dog before she was muzzled, I just grabbed her and pulled her off. Luckily for me I've never been bitten yet, but it'd be my fault if I was. If you haven't got a hose or something handy there isn't all that much you can do. I generally grab the attacking dog just in front of the hips from behind, they don't seem to be able to swing round quick enough to get you then. I really hope the poor boxer is alright though...