ORIGINAL: GMMAT
I wouldn't unload my quiver into a spine shot deer, but I would put 1 more arrow thru the lungs, thats all it would take to kill it!
You're missing the point. Rarely (as in never.....in my circumstances) will you have an unencumbered, "sure-thing" shot at the vitals. In this case.....I feel like it's MORE ethical to throw caution to the wind and shoot anyways. A vitals follow up is "ideal" but ANY arrow hitting the deer is better than one NOT sent.
I'm not missing anything! Let me put it in your terms. If I spine shot a deer, I would put a second arrow thru the lungs, thats all it would take to kill it! "If" the second arrow "didn't" go thru the lungs, I would send another arrow thru the lungs. "and so on".... Is that the answer you want????
I would not keep shooting arrows into the lungs, "one" arrow is enough!