RED SKIN broken feathers, mites and scaly leg!

[arpyhh]

Due to this long cold winter, the flock didn't get their health and wellness checks as often as they should have... :/
I have 15, 9 are red sexlinks, and they are the ones affected by this weird red skin
It looks just awful!
Everyone has mites.. But just a few of the reds have the red skin.

Can anyone tell me what this could be from and what I should do?

I just dusted everyone with 5%, and dipped their legs in oil.

 

[Judy]

I wonder if it's sunburn. I'd probably smear it with Neosporin, but then I tend to put neosporin on everything.

 

[hollyj]

I live in North Florida and my Rhode Island Reds flock of 9, the backs on 5 look exactly like this, what is causing this