Hit a big body deer in the liver at 20 yards. He didn't run but just walked away. I found the arrow covered in deep dark red blood. I walked past this deer 3 times (spotty blood trail) before it bolted across a field. I went back to camp and gave it 4 hours. Came back out with some help and looked for another 2.5 hours. The only reason we found this deer was the noise the crows were making pecking at its wound. We went over to see what they were doing and we found the deer. True story, so in despair look to the skies for crows!