The thing most hunters lack is good tracking skills, and knowledge of the game they hunt.
This is true waksupi, and it starts with some ancient advice I got from one of my brothers years ago. "After the shot, do not go to where you 'think' you saw your animal go. You may have seen another animal fleeing the area. Go to exactly where it was when you took the shot, mark that spot, and start tracking from there." You don't want to push a wounded animal immediately anyway. And you won't catch up to a poorly hit animal by running after it. Look for a hair ball, from an exit, at the site. If there is a confusing amount of tracks, do expanding concentric circles around your marked spot until you find some blood. If you don't mark your spot, especially in snow and/or heavy woods, your old tracks will start to confuse you when trying to sort things out. Old snow [granulated] is your tracking friend if there is blood, as it will really show up. Deeper powder snow can be a problem as blood will mostly drop right through it. Follow the most recent looking tracks. Especially ones that look frantic. High shoulder and back shots can take long distances to show blood. It is draining into the body cavity. Don't expect blood at point of shot, and don't assume a miss if you don't find it for quite a few yards.
If you see stomach matter or feces in the blood, you probably have a mess on your hands, unless it was a frontal or quartering to shot. The gut shot can still creates Ungulate Depression and the beast will try to bed down. Follow up.
Deer can, and will jump 20 feet or more upon being hit, so there usually isn't a magic pool of blood evidence right where it was standing.
I once completely disconnected the heart of a whitetail buck and it jumped right over the fence it was standing next to. It ran 25 yards before any blood showed up. It was leakage. He collapsed at 40 yards The blood pressure gauge was at zero. His heart was rolling around in his chest like a tennis ball. SW