If you go for the lungs, make sure you can hit both of them. I hunt on the ground, so it never happened to me, but I helped a lot of guys try to track deer I think were only hit in one lung. We almost never found them. You get a huge lung blood trail for 50-60 yards and it peters out. I think that the shooters are so high in a tree that they only hit one lung at the angle the arrow is going through at. You get a dozen guys beating the brush and still find nothing. I can only guess it was a single lung hit. I hit them through both lungs and they are down in 50-60 yards. I don't know, what do others think?