I once bought 2 feather pillows. They were very nice but once in a while, a feather would poke out and stab you in the cheek. I guess you have to cut the hard part of the "vein" of the feather up high, else it will poke through the fabric.
What an interesting idea. I'd like to know if you do follow-up making feather quilts--I bet your process is a good story.!