I found out something rather excellent. You can stamp on feathers! I used stazon ink to stamp on these ones pictured. I then pressed them between two acrylic stamping blocks then placed the Night watch books on top for a week. (Nothing like Russian tomes on good and a bit evilish to squish things into shape.)
So stamp away sweeties!
PS MAJOR WARNING ONLY STAMP ON FEATHERS YOU FIND AS THE BIRDS GET VICIOUS IF YOU STAMP ON THEM WHILE STILL ATTACHED.