My four-day-old call duckling has been scratching herself nonstop for the past day or so! The poor thing is so itchy. She's scratching her back, her belly, her head, everything. I've noticed some white flakes in her down that look like they might be dead skin. Could she have dandruff? What can I do for her? I have an appointment with the vet in four days but I'm worried that this could be a more urgent problem. Any suggestions as to what could be wrong?