I am not really sure you wil get any big amount of blood out of the deer by hanging it. Once you have shoot the deer and the heart stop there is not much more going to come out that will make that much of a difference. I have a fridge I hang my deer in and there is no more then a 1/2 cup in the bottom and that was over 4 days. I archery hunt only so maybe with and arrow the deer has more time to bleed out a little more then a gun shoot that drops the deer in the spot. Just my op.