Is this normal?

[Rachael23]

Black Rock, I've tried sudocrem but no change, have just bathed her in Epsom salts. Is this normal? Can't find any mites and eating and drinking well. Thank you

 

[Rachael23]

She is one and a half years old. Is fed layers pellets plus treats and is fully free range, acres and acres plus woodland she sleeps in a green frog designs coop. Which is cleaned and diatomed weekly.