I think John gave a pretty good scenerio Jeff. I have had this happen but got lucky with the weather being cold and found the deer to salvage the meat. You have been hearing this for awhile im sure. It happens to all of us. I have had them fill up and then blow massive blood through there nose right before they go down and no blood in between. My doe last season, on a perfect double lung pass thru, went around 500-600 hundred yards with a blood trail 2 feet wide, up and down hills, and half ways across a pond before i found her floating. Deer can be tough, keep your chin up and keep pushing on This can bring up the question of, is hot weather hunting a good thing.