Right on brett! IF, and if is the key, grind any deer, pork fat is the grease for the wheel!
Butchers will use pork trim at the end of the day for their fresh sausage mix. So you can also buy a shoulder or Butt, bone out, chunk up, and grind away with your venison! Or, ask for pork fat, probably get for free.
Just hate grinding any venison, though! It's All good!