I have a problem that I believe is mites. I have treated my 33 birds with coconut oil infused with lavender. I t seems to be working, but I have a small red hen that has lost of her feathers on her head. Living in northwest Illinois the weather is starting to get cold and I'm worried that she will get frostbite on her bare head. Is there such a thing as some kind of cap that I could put on her to help keep her head warm. The coop is heated but she still goes outside! Thanks for any help or input.