Just to add to Frankenmauser.... Beyond field dressing, just the proper care of the game meat in general.
I've seen guys bring in a deer for processing that had clearly "gone over." I believe the deer was shot at least two days prior.
One warm day, 80 degrees or more, I watched a guy shoot a doe and then allow her to lay for over an hour before he even got out of his stand to look at her. From there, he started dragging her out of the woods without cleaning her.
A coworker's family does game processing a during deer season and I was amazed at how often they get hunters bringing in deer without field dressing them.
To me, not immediately dressing the game is asking for some funky meat.
"He who laughs last, laughs dead." Homer Simpson