I was skinning one of the deer we harvested last year and there was pocket of very light green ooze on one of the hams. It was about the consistency of elmer's glue, but thicker. I forget who I talked to (wildlife officer or butcher, as I recall), but they said it was probably gangrene from some type of wound. I thought that when a human got gangrene it was all over. In any case I cut it all away, we ate the deer, and we all lived to tell about it. Incidentally, while eating some ground venison a month or so ago I bit into something hard and spit out a shotgun pellet. No way to tell if it was the same deer or not (we got two last year).