Plus one on this. The buck I got this year did not have a blood trail until laying down. I had a solid shot, clipping some of the heart. Luckily I had film footage and reviewed the shot, even though I was 100% sure I hit him. Luckily for me I found him laying 40 yards from where I last seen him. It's not fun just walking blindly. I've trailed enough animals and they almost always stay the same course once wounded. I will say he went through some of the thickest stuff he could find.