In addition to what Birdrain92 said.. here are a couple of links for you
https://www.backyardchickens.com/a/mites-chicken-pests-how-to-protect-your-chickens-from-mites
https://www.backyardchickens.com/a/mites-lice-treatment-and-prevention
for your scaly leg mites - how often do you apply the...
Does anyone have any advice on getting pullets to hatch? I have little cockerels coming out of my ears. Out of 6 to hatch i might get 1 pullet, if i am lucky.