Ever wondered where the elk has hidden his antlers when you shot him or when the sabre cat went blind? Or why the humans of Skyrim are that heartless?
Now, this has been fixed (and a whole lot more of those inconsequential economizations)!

Here's a list of the exact changes/additions (might be missing some though):

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    -    Chicken Eggs respawn every 48h,
    -    25% chance to find an egg inside a chicken
    -    Other Bird's eggs respawn every 30d
    -    Harvesting a Garlic braid grants 3, Hanging Elvesear 2 ingredients
    -    Mammoths contain 2 Mammoth Tusks (in addition to their other inventory)
    -    Boars (at Solstheim) contain at least 1 tusk and flesh
    -    Powdered Mammoth Tusk can be crafted at forge (turns 1 tusk into 5 powders)
    -    Tap Root can be cooked into Spriggan Sap at a cooking pot
    -    Sabre Cats contain 1/2 eyeballs and 2 teeth
    -    All deer and elks have their antlers!
    -    Beehives contain 10-15 Bees, 2-4 Honey Combs and a Bee Hive Husk
    -    Chance to find Spider Eggs in Spiders,
    -    Find 1-5 Spider Eggs in each Eggsack
    -    Chance to find a Slaughterfish Egg in Slaughterfish, 25% chance to find other fish/Salmon Roe in Slaughterfish
    -    Chance to find Salmon Roe in Salmon
    -    Mud Crabs contain 2 Mud Crab Chitin
    -    Giants contain 2 Giant Toes (in addition to their other inventory)
    -    Bears contain 2 Bear Claws and their pelt
    -    50% chance to find 1/2 additional feathers each in (Bone) Hawks
    -    75% chance to find Human Heart/Flesh in ALL humans;
                [RACES: Nord, Breton, Redguard, Imperial]
    -    Human Flesh and Salt Pile can be cooked into Cooked Human Flesh
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If you have any further ideas to make Skyrim's ingredient gathering more natural/obvious, let us know!
Have fun,
Neldor258