Make new pillow covers for them. Make smaller lumbar or toss pillows. I still have goose down pillows my mom made in 1957.
I just love feather pillows! As Naomie suggested, recover them and use them. Make them smaller if needed for more depth.
I agree, recover - I have opened them up to use as stuffing in a floor cushion, but ended up with feathers everywhere. I would recommend trying to find a way to repupose without cutting open!!
Yes on reusing them, don't have the heart to dispose them. Even made some in the past for our furry babies.