I have one Indian Runner female that has started losing her feathers and looks kind of scraggly. I noticed yesterday several of her feathers in the run. I do have 2 other Indian Runner females that are the exact same age and they seem perfectly fine. They are roughly 10 months old. Is she sick or going through another moult or getting picked on? I also have a Mallard drake and female that are about 6 weeks older than the runners. I am a worried fairly new duck mama.