Can you post photos of the legs and feet?I just noticed my 19 week old polish pullet has scaly leg mites. She's the only one out of 25 birds I can see the signs on. Looks almost like calcium deposits. I soaked, gently brushed a bit with an old soft toothbrush (because I site I was reading recommended a gentle exfoliation) and then rubbed gently with casteroil and then patted the excess off and slathered with petroleum jelly. I am hoping that helps. I was reading also that they say to dip the legs in gasoline, air dry and then use a lanolin based diaper rash ointment on the eggs. repeat 3 days in a row and that's it. Aside from the cost of gas these days, does that actually sound safe?
There are many methods that you can use to treat Scaly Leg Mites, choose one that is the easiest for you to use.
Yes, you can use Gasoline followed up with A+D ointment. From what I understand, it's the "fastest" method.
The treatment you used - soaking, scrubbing and application of Castor oil will work too. You will need to re-apply the oil for several weeks.
https://the-chicken-chick.com/scaly-leg-mites-in-chickens/