Hey DT, I have been so unlucky to have hit two deer in my life in the shoulder knuckle. I found both arrows within 50 yard of POI. Both times I had less than 1 1/2" of penetration. If that is where you hit him at, you should be able to find the arrow fairly easily. Also, if that is where you hit him at, he will be fine. However, I am a little concerned that you were not able to find the arrow. It would lead me to believe that you did not hit him in the shoulder knuckle and that the arrow is either still in him or is laying on the grounded where he bedded. I don't know what your timber looks like, but I think it would be worth the effort and retracing your steps again. Good luck and I hope the outcome is favorable.