For chickens we use arrowroot powder- basically because that's all we had to hand when a hen fight resulted in a comb that wouldn't stop bleeding. You need to remove all the blood from the wound and get it and hold it in place quickly. We used it again a few days later with the same pair. We tried 'plastic skin' which is a spray, but it wouldn't set fast enough and just got washed away.
Haven't tried corn flour.