I have been treating several of my hens with scaley leg mites by dipping their legs in a bowl of vegetable oil and have been pleased with the results thus far. 4 of the hens I'm treating have feathered feet and I'm worried that the oil will ruin their feathers. One of my cochin bantams just finished molting recently and when I treated her tonight, her feet feathers and the feathers on her chest looked matted and greasy.... Will this wash off over time? Or will it permanently mess up her feathers until they molt again? I'm worried her new beautiful feathers will be ruined right off the bat.....