RE: Curing feathers?
I haven't done this with chicken feathers, but I have with whole skinned pheasants -- used some feathers for flies, but most to make Christmas wreaths.
I skin the bird, microwave it for about 3 minutes, pick off whatever meat/fat cures up, and then treat with borax on the skin side. Store between sheets of news paper for about a week and then shake off the excess borax. The borax is laundry detergent -- 20 Mule Team, I think.
The poster formally known as Duncsdad
Everything I say can be fully substantiated by my own opinion.