I've had my chickens for a couple of days. I noticed today that they probably have mites (I found what I think is a mite on my arm after handling the chickens) So I decided that I probably need to get together a little chicken first aid kit to have on hand. I've had a chicken that has looked a bit disheveled since I got her. She acts like all the others and is eating and drinking just fine, she is just all fluffed up. While I was researching what I need for my first aid kit, I saw that being fluffed up like that could indicate an illness. Here is a photo of here. What do you think? Could this just be from mites or is there something else I should be concerned about?