Twilight had a blood feather, which means a new feather that is still coming in, break one time and it was bleeding. I grabbed a towel and gently held her in it, using tweezers plucked the broken feather out at the base. That will stop the bleeding, it would be a little bit like pulling a hair out quickly on your head. The important thing if he is bleeding a lot is to get that feather out at the base ASAP.