Crusty beak

[kmw9256]

I noticed on the one chicken. I have both her sides of her beak. Have a crustiness about them. I didn't want to try to pull it off. I did try to wipe it lightly with a tissue but it didn't budge. So I know it's not food. What could do about it? And is it something I can treat?Thank you in advance

 

[p4PaDuck x2]

Can you post a picture?

 

[Eggcessive]

What has she been eating? I agree that a picture might help.