Depends on the distance. I am not going to shoot at a walking deer at 30 yards, but may consider it at 10 yards ona deer moving slowly. I will usually stop deer that are close because they won't be able to duck the arrow if it is 10 yards or less..at least not significantly. If a deer is moving fast at 25-30 yards, I usually will not try to stop them and put them on alert, I like to let them stop on their own.