Where can I find the rules for "Deer Hunters Challenge"?
I found the game for sale on a site called cauf.com that says


  Since we are located within the heart of Ohio’s Amish community, we have access to some of the most amazing and high quality products directly from the manufacturer, saving you money.


And there is a Six Mills Game Company in Ohio, or at least there used to be. Sites that list business information aren't always good at staying up to date. But since the game is still for sale, it seems like a good bet.


  Six Mills Game Co, 8076 State Route 241, Millersburg, Ohio 44654
  (330) 674-2541 


You can try contacting them for the rules. And maybe the company name/location is just coincidence, because I couldn't find anything else about them.  Good luck!