Ask 3 sheep hunters that question and you’re likely to get 4 opinions - that being said, this is what a typical day looks like food wise for m.
BREAKFAST - Instant Coffee, Oatmeal/Musli Mix of my own creation (going to try to re-create some of the Heathers Choice Buckwheat and Chia breakfasts this weekend), plus a couple small date/chocolate bars to snack on in the morning.
LUNCH/SNACKS - nuts/trail mix, candy (quick energy), 3 Lara bars/Epic bars depending on the day (can use Clif or any bars - I find most of them make it smell like a demon is trying to crawl out of my backside if I eat too many of them), and Nuun/Electrolyte tabs. I try to eat a bit every 2 hours or so as opposed to having a full lunch. I may try bringing some of the energy gels this year for quick sugars and protein, but we’ll see.
DINNER - some kind of home-dehydrated meal (chili, beef stroganoff, Mexican shredded chicken, etc), maximizing carb source (cous cous or dehydrated hash browns typically) and protein. Will usually add a glob of either olive oil or coconut oil to it for fats. Usually end up having a hot Gatorade drink before bed and have brought some kind of protein shake to aid in recovery.
As for calories, its a bit tough to know for sure because I dehydrate/prep most of my own food, but my goal is to have 2# and 3200-3500 calories per day. I’m 5’11/205, and I find that this is enough to sustain me over a 10 day hunt (not replace, but at least keep me going). It’s all pretty personal and based on trial and error (in my case, mostly error).