Take a photo of her and post it. Even better, make a brief video and post to YouTube, copy the link and paste it here. Then we can see how alive she is or how close to death.
It's important to know your city, state and country so we can assess extenuating circumstances that can help you.
If this hen is conscious, she might be saved. If she can drink on her own give her a cup of warm water with a teaspoon of sugar and a pinch of salt and baking soda in it to combat shock. If you have to take an oral syringe and give her water that way.
We need to see the extent of the damage to her beak in order to tell you what to do for her. To stop the bleeding, dip her beak in sugar or corn starch. Examine her thoroughly for other injuries. Go systematically from head to the tips of her toes. Puncture wounds are most dangerous and life threatening and easiest to miss.