I've shot a bunch of deer over the years, and fortunately, never had to track but one, and that one was shot with a arrow. I've helped track a bunch that were shot by other people, and I have only seen one deer go to water, and that was one shot with bow by a neighbor. Sometimes, for whatever the reason, they don't leave a lot of blood. I've had people tell me about shooting a deer, and it left a blood trail that a blind man could follow, only they never found it. My experience has been that if a deer left that much blood, it was dying, and should have been found.