What a wonderful food for your chickens!
You can render the venison tallow and make suet if you want to be bothered...I thought it was fun to do...I did this with beef tallow a month ago and they love the suet...but sounds like raw is just fine. My only concern with raw (or even cooked) is that if you have predators it might be an attractant. The suet doesn't seem to be, but if I gave mine more meat than they could clean in a day, I would be removing it to inside (like put it in a cooler) for overnight, etc...just a thought.
I jealous! lol
Makes me wonder about using the offal now...