Scaly leg mite bore under the scales of the chickens leg, lifting the scale and will cause the fowl physical trouble as time goes by. You can smother and kill leg mites with a myriad of creams, grease and meds. Some are: Scarlet oil, Corona smear (for horses), Vaseline Petroleum Jelly, WD-40,Bearing Grease, bacon Grease and VetRX. The idea is to SMOTHER the leg mites and medicate the chickens leg at the same time. It's best to use at least vasaline petroleum jelly (the kind you buy at any store) on ANY of your fowl occaisionally. This will prevent leg mites.