Chalk me up as one that lost one on Saturday morning. It was doe and the shot was a little high, and she fell right where I shot her. She kicked around a little and then layed down broadside and begin taking long and heavy breaths.
I eased out of the stand and went back to get the mule to get her loaded up (20 mins round trip) when I got back she was gone. Found blood for about 20 yards and then nothing. Spent the next 5 hours searching and nothing. Went and got the dog at about hour 2 and he was on the trail for a little while and then either lost the trail or gave up.
Very frustrating. Had I known I wouldn't recover her, I would have not taken the shot.
Not bashing on you, but I learned a while back that if they are in range and alive you need to put another round in them quick. Never leave a wounded animal you could put another round in. ( this is assuming you were hunting black powder)
If it's a bow shot and you spined the deer, I've found that its best to get up there and put another arrow in them quick. I've seen deer shot in the spine with an arrow get up and walk away and recover.
Live and learn. Better luck next time.