A couple of years ago I took a nice little 6 point. Saw him go down and stay down. Went and checked on him and sure enough he was down for good. Walking back to camp to get my buddies to come help, a doe stepped out in front of me. I wasn't ready at all. Just walking up the sandy road, bow in hand, no release on, not being overly quiet, no arrow ready, nuthin! I was able to move to the side, put on my release (which I had to get out of my fanny pack), nock another arrow and drop her also. Once again, she didn't go far and it was over. So I had shot 2 deer in the course of about 45 minutes. They were both down and marked.

I went back to camp, waited for my buddies to arrive and then we had some work to do! So yes, if I was sure of the good placement and kill shot on the first, I would shoot the second.