So if you have very little in the way of natural resources, but one of the resources you DO have in relative abundance is feathers (pigeon and occasionally chicken feathers in the one setting, a much wider variety of birds in the other), what might you do with them? Any way to spin them and turn them into cloth? Or maybe use them whole in some way for warmth? These people don't have room to grow flax or hemp or cotton and certainly don't have room to graze sheep or goats. One setting does have domesticated rabbits and the other has occasional skins from animals hunted in the Extremely Dangerous Place, so I've got backup clothing sources, but if they CAN do anything with the feathers they have, they WILL.
If it matters, both settings have rather ubiquitous but very limited magic.
googling "feather spinning" and "feather cloth" did not find me any useful results, and I haven't seen anything about feathers as a fibre source on handspinning-related websites. If nobody has a clue I may just go buy or collect some feathers and dig out my drop spindle and see if I can make it work somehow. Heck, I might do that anyway.