I've been slaughtering cute fuzzy wild animals for quite some time now, and my bag is chock full of bits of animal and wild herbs.
So far I've not found any crafting recipes or missions that require me to have any particular bits of stuff. Further, all the challenges seem to want me to just kill or collect things, and aren't particularly concerned with the contents of my inventory.
Is there any of this which I need for any reason, or should I just sell it to make a quick buck? (no pun intended...)