I wouldn't do put anything that aromatic on her beak near her nose. Just dab some neosporin ointment on the tip and it will be okay. I've had two hens do that and it grew back just fine.
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How did you help heal it? I have a hen right now who broke the tip of her beak and it's bleeding a lot.A picture might help tell how far it broke off. I had a rooster who broke the tip off of his upper beak and it did grow back. I had another one that cracked his beak at the nostrils and to my surprise it also healed.