gailbelanger
Chirping
So you're actually filing the nail? Not the skin/ bone right.A roosters spurs can be dulled in two ways. By putting a cover on them, and by filing them with a Dremel or a small metal file.
I did see in a book I purchased that if you warm a potato in the microwave then stick the spur into it. You let it sit for a couple of minutes then twist, that it takes the spur off. But I don't think that everything you read in books is all that easy.