my Main reason for intervening in said circumstance is that at least they won't die in front of ME!
Let them die where and when they may, I just don't want to see the carcass and the blood.
if there is not great risk of imminent DEATH, I always walk away as fast as I can. very simple rules to live by. :-)
I even had to do this with my sister and brother in law once. No - neither of them died.
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