Quote:
I would cut it and pull it like you say. If it grows back with a white tip then its up to you what you do. You know the status of your breeding. If you think it is most likey to improve your line than use it, hatch a bunch and keep only the ones without the white, and do not go back to him for breeding. If you think #2 is just about as good, then use him. White like that can be caused by damage to the feather when it is coming in. If that's the case then it isn't genetic and I'd have no problem using him for breeding. I hope that answered your question and didn't confuse you. If it did, let me know and I'll try to simplify my answer.
David