Hi. We have a white hen that is dirtier than the other hens. We ordered her from a hatchery and have had her for about a year and 1/2. She's the only hen who lays a white egg so I know that her egg production is good. She was debeaked when we got her. It appears that she isn't preening the area under her vent--it's not crusty but very dirty. We have other light-colored chickens and they're clean. They're mostly outside in the dirt/straw. I'm wondering if she's not preening as much anymore because of her beak? Should I be worried? Thank you for your help.