My almost 6 mth old Chochin mix ... . She and her sister began laying about a month ago and all was well, an egg from each of them a day. Then last week she began staying in the nest all day. We let it go for 3-4 days, I assumed that she thought she was going to hatch the, what I thought a half a dozen eggs by then. There was only one egg. I took her out 2 days ago, she joined the 2 others, she eats she drinks, but she goes straight back to nest. When I extracted her today again she eats and drinks but I noticed she is shaking her head and she walks at times as if she is off balance. To top it off my chicken here first, picks on Jingjing. I'm assuming if she is dizzy that she is most comfortable in nest. I am quite concerned and would be grateful for any help.