Chicken pecking… also known as cannibalism, can be a big source of future problems for your chicken flock.
So, don’t delay when one of your birds becomes injured, or picked, and begins to bleed. Treat her at once with a good anti-pick remedy.
If at all possible, keep her away from the flock until her wounds have healed.
You definitely don’t want to give your birds a chance to become cannibals.