Mites?

[KarateHorse]

One of our leghorns has a black dot under her scales. I have never noticed this before and we recently treated scaly leg mites. Is this a mite?

 

[Wyorp Rock]

It looks like is may be a bruise or could be pigmentation of the skin.

Scaly leg mites create raised scales - here's an article with good photos of SLM http://www.the-chicken-chick.com/2013/03/scaly-leg-mites-in-chickens.html