I got this idea from Gene Wensel years ago and its totally carnivore/keto..... Get a nice thermos that you know keeps things warm and boil up some hotdogs in little chunks and pour that in your thermos. Get the high fat hotdogs and when you're done eating the hotdogs drink the water "brine" salt and fat and liquid all in one. It warms you up and you're not eating fast burning carbs. It may sound disgusting but when you're hunting and its cold, it works and you'll love it.
I like that, but I’m going to use kosher dogs. I am not a fan of lips or hooves.
Definitely be an upgrade to my thermos of chicken broth.