I am having a terrible time getting rid of leg mites... I read to mix "Poultry Dust" which is Permetherin (sp?) with Vasaline.. and slather it on... I have used it three times...
Also... have bought and used Scarlet Oil in the form of RED KOTE (Dr. Naylor's Red Kote... same maker and brand as Blu Kote Spray for injuries).
I am waiting to hear back about another treatment -- but, in the mean time I will use Vasaline by itself again, tomorrow, in another effort to smother the mites.
I am finding them hard to treat. I can only suggest searching here on BYC.. "Scaley Leg Mites" and see what others say...
Oh, I have also used Eprinex to no avail. (don't know about the Ivermectin)
Good luck.