Chick not preening feathers?

[Tikihen]

I've got three chicks at the moment all around a month old and one isn't preening her feathers, they just look messy while the other girls look much neater. I'm just wondering if she'll figure it out or what I can do?

 

[Chicken Girl1]

She'll figure it out on her own.

 

[Tikihen]

Ok great