Also remeber that Deer can live off one lung just as we can The deer is most likely sore but is fine It happened to me when I shot a doe last yr I was aiming for Heart but she was bending to eat and her shoulder got in way it was very load hit but my arrow only went in about an inch alot of good bright blood at first for about a 100 yrds then nothing we found my arrow next morning about 65 yrds aways like yours it was stuck in her for alittle bit I'm sure your arrow is around the area she ran , we searched the next day All day and found Nothing I hope to get a shot Finally shot on her this yr Good luck!