I have a hen that lost feathers under her wings because of mites or something I can't see. It's going to be in the high 20's to low 30's at night for a few days. Can I put a saddle on her to keep her warm? Does anyone really think it will help. While she seems to be okay in this cooler weather, today while she was dusting, it appeared that she was shivering. Would appreciate some input.