Okay so three days ago I went in to put my birds away in there hut at night and I noticed my Jersey Giants head was shaking so I kept watching her and all of a sudden she threw her head back against the back of her back and started moving it side to side and I just thought at that time oh maybe she has an itch but she's been doing it every night and its starting to worry me. She's completely fine in the day time I'm pretty sure, I only notice it in the evening when I go to put them away. Has this ever happened to anyone else birds or have any answers I would love some as soon as possible. So far none of my other birds have done it.