I did Google search after Google search, and either the forum I found had no answer, or the answer didn't work for me. I've also searched for my problem here on the Nexus Forums, as well, with no luck.
The problem is that some (but not all) of the food items with Realistic Needs and Diseases installed don't reduce hunger. Some of my installed mods that might be important in relation to RND would be Realistic Wildlife Loot and Recipes, SkyTEST - Realistic Animals and Predators, Immersive Creatures, and Better Sorting. I don't think Better Sorting is causing the problem because it's both placed above all of the RND mods and I opted out of the changes to the food it makes. I've tried fixing the problem by setting all the RND mods to be placed below Frostfall and all of my mods relating to Immersive Creatures (though I don't think SIC changes food items or drops at all), but I'm still getting food that don't seem to be affected by RND like they should. I believe that I have all the available patches for RND, such as the ones for the DLCs, Dawnguard, Hearthfire, Dragonborn, as well as ones for my other mods, like Pure Waters and USKP, as they're all listed in my load order, all below the main .esp file.
One little not that I think I should mention is that on the Realistic Wildlife Loot and Recipes mod page on the Nexus, it implies that it is compatible with Realistic Needs and Diseases through the 'RND_PatchPack' that's listed in RND's files, but that Patch Pack on the RND page doesn't list RWLaR as a covered mod. Because of this, I didn't install the Patch Pack.
Here's a list of all of the foods in the cooking menu that don't have their proper RND effect as they should, along with their effects:
It's really aggravating because many of the food items that don't work with RND are very common, like the Venison Chop and Wolf Roast, so most of the meat that I find isn't going to be useful in depleting my hunger.
My full load order, if it's of any help:
Any sort of direction is much appreciated.