I just roasted a home raised duck. The duck had cleaned up really nicely with smooth clean skin. I checked it again before it went into the oven. Nice and clean. At the half way mark, I pulled it out of the oven to check on it and it looked like a hedgehog. It was covered with bristling pinfeathers. The pinfeathers had to have been right below the surface, ready to break out, and as the skin cooked and softened, out they popped. Fortunately, any pinfeather in cooked skin come out super easily. It would have taken just a minute to pull all those pinfeathers, but I happened to be cooking that duck to get shredded meat for duck tacos, so I just threw the skin away. I just had to tell you how surprised I was to open the oven and find my nice clean duck looking like an angry porcupine.