There a just one wings worth that got a good blood spray. They are white and I want to dye them a bit so I thought they should be clean. I'll be using hair dressers dye and there is bleach in that so maybe I'm overthinking, again. I did try your warm water and detergent on the one I had soaking and it got the blood out. I'll just wait until it dries to see if seemed to damage the feather at all.