I previously thought that if deer were moving at a slow enough pace (meaning a slow walk) that I shouldn't stop them for fear of string jump and just follow and squeeze. Thedoe below is why I've changed my way of thinking. It was at 18yds with a slow steady stride, maybe 2mph. I did as described above and the results were almost disasterous. The blood trail did not start for 40yds and was fairly light and faded to specs pretty fast. Luckily I backed out and went back the next morning to find her laying stiff 150yds from where I shot her. As you can see, the entrails were hanging out on the exit side. I had my pin behind the shoulder on a slight quartering to shot and by the time the arrow got to her, it hit right in the middle.

I'm not saying that anticipating where the arrow will hit then just squeezing it off a little forward on a walking deer wont work, I'm just saying I don't have enough skill, confidence, or self control for that yet. Til that happens, I'm stopping the animal and aiming behind the shoulders and a third way up. If it string jumps, it string jumps, that I can't control. What I can control is whether I want to chance a moving target or not.

Better a missed opportunity than a bad hit resulting in a lost deer.