Sorry to hear that. I lost a probable B&C whitetail to weather once early in my hunting days. I made a solid hit and watched him pack the arrow as he ran away for about 150yds with the arrow sticking out right behind the shoulder. I left and planned to come back in a couple hours just to be safe. We got hit with a storm that just blew up right there and got 4" of rain, the creeks all flooded. I think he went to water and got flushed down the creek by the time we went back. It was only a couple miles from home and we searched everywhere for days, watched for birds, and checked after burning the pasture in the spring. Only thing that we could figure. It sucks but it happens if you hunt long enough.