A crazy thing happened...
I'm washing salt from my truck the other day and find a sopping wet blue and yellow macaw feather in the suds. I keep one as a decoration in my truck so though oh crap, it fell out and I doused it.
I rinsed it in a puddle and placed it on my dash to dry out. Next day, the thing is dry and looks quite good. I notice it looks a heck of a lot better than it did before. I also notice the barbs are almost even on one side than the other. I'm sure one side didn't shrink from the side tail feather I put into the truck so I turned around and my ol' ratty one's still there.
Someone brought a real nice B&Y macaw feather to the car wash and dropped it... it looks like a 40 dollar feather, freshly rinsed too!
I'll tie some horns into my swap flies with them.