Diamond M.., If your steer has actual Dandruff in the clinical sense it is actually a fungus and needs to be treated like a fungus. If the calf has dry flaky skin (not clinical Dandruff) than that is obviously a different issue. If it is actual dandruff you may consider using a antifungal wash of sorts and I know in humans you would work that antifungal in and let it sit for some time (15 minutes) before rinsing. Frequent use is key. As I am sure you are aware, if it is just dry skin I surely wouldn't be using soap on the calf very often. Good luck.