how do I treat a cracked beak

[Bawkbok]

I discovered one of our hens has a cracked beak. I can't get a good picture; she doesn't like to be handled. It appears to have a small notch on the side with a crack that goes from one side to the other of her upper beak. It is approximately 2cm from the tip of her beak to the upper part. It is discolored a dark grey. She is foraging and eating ok. Do I treat it in any way or just leave it be? She is a Buff Orpington about 14 months old. She is still laying eggs several times a week. Thank you.