Right. My general attitude in emergency situations (which is how I think I would categorize seeing abuse happening right in front of me in that moment) is to follow the principle I heard from my friend who has EMT training, which is that the first thing you do in evaluating a situation to decide how to respond is MAKE SURE YOU DON’T END UP NEEDING HELP YOURSELF.
Obviously, with an EMT, that is more likely to mean something like waiting until they get an all-clear from fire fighters that the car is not going to explode or what have you, but as a general approach to emergencies, it seems to work fairly well. With someone engaged in temper-fueled abuse, like I said, I have exactly no experience fighting with anyone and pretty crummy joints. If I had to get into a fight I’d probably come out the worse for it and then potentially not be able to take other steps like contacting the police, recording, caring for the animal once it had been gotten away from the abuser, and so on.
I don’t think it’s cowardice to not just throw yourself right in there, I think it’s being smart to figure out the best way you personally can help. Cowardice would be not doing anything at all, ever. (I mean, if it was the BO doing the abusing, I can understand waiting to speak up until you’d moved your horse to safety if you feared retaliation. In that sort of case - document EVERYTHING, and report it as soon as you possibly can safely.)