What to do with Feather Comforter ?

Hi y'all,
(Long time lurker first time poster)
I thrifted a beautiful comforter a while back that's stuffed with real feathers. I used it in my bed for a couple weeks or so until I noticed that feathers were getting everywhere. And I mean EVERYWHERE. Allergies that I didn't even know I had were triggered. I don't know if I cared for it incorrectly or if it was just too dang old (I'd guess 1970s by the color, but who knows, it was thrifted). Anyways, as a strong believer in the cycle of commodities I'd like to give it a new stage in life rather than throw it away to the landfill. I imagine the feathers went through some kind of processing and have definitely been washed in chemical detergent so I doubt they're compostable... I'd at least like to save the fabric, but I'm scared of releasing a million allergy-inducing decaying feathers into my house, or the outdoor environment considering whatever chemicals they've been exposed to.
Any ideas?

Welcome aboard!

I can't handle feather pillows either, but I kept a couple in the garage for the birds.

In spring, I take a couple of handfulls and spread them around when there's a light breeze. Migrating songbirds pick them up to line their nests.

It's particularly delightful to watch swallows catch them on the wing.

Where is it leaking?  Holes that can be sewed?  Out thru the fabric because of poor fabric choice?  Out thru the seams?

PS you can get tightly woven or plastic lined duvet covers that seal the allergens in for quilts.