Hens legs are suddenly thick and crusty. How do i get rid of this?

[The Birb King]

Not great pictures, but after going broody and hatching out chicks, one of my serama hens has very thick crusty legs and is limping. I have had issues with leg mites before so maybe it has something to do with that

 

[Chicken_Obsesser]

That looks like scaly leg mites. @Eggcessive can give you some more details.