Hi. I'm currently working full-time in the suburbs of Chicago and my husband and I are planning our 5 year exit strategy after daughter graduates. I don't currently have chickens, but have varied household pets (cats, dogs, a rabbit and a guinea pig)
I would love to raise heritage breeds such...
I found this link that says to steam/pressure cook & sterilize the feathers, then dry them out, then grind them up. You could use appliances you likely already have in your kitchen for this.
http://www.bettervegetablegardening.com/feather-meal-fertilizer.html