In colonies that like to hunt, meats and hides tend to stock up a lot. There are over 500 of a single type of hides in one of my colonies. No projects really makes us spend a whole bunch of these resources, so they are just left around, and i imagine it will just get worse as time passes.
I want to suggest making us able to have be some large projects that takes a lot of hides, to improve their quality or something like that. Perhaps you could take 10 quality 1 hides to make 1 quality 1.5 or 2 hides. It could improve ranching skill, I guess, and use a tanning rack kinda like making leather. Making leather just doesn’t spend enough hides!