Drift,
Dont give up man, like said before. Unless everything else is discouraging! We have all lost deer, on the other hand I have recovered deer that should have been lost. Mark where you shoot!!!!! Start there in trailing, I dont give a damn if you seen the animal go down!!!!! Start in the begining, look for hair then blood. Dont walk on the blood trail. Mark the last 2 (AND I MEAN 2 SPOTS OF BLOOD) go slow, dont let your buddies walk all over in front of you( I prefer trailing by myself), and give it time!!!!!!!