Ive tracked a lotta deer for people in 20 years and I have nothing to base this on but my own observations but it seems like every time I track a deer that has "watery blood" involved its either hit low in the chest or in the brisket area.Sometimes it starts off bleeding good then dries up after a short trail or you find an occassional spot over a longer period then it quits but you usually dont find the deer.Bright side is quite often its not a lethal shot and you will see the deer a few days later or hear about another hunter taking one with a graze mark from a bullet on him.