Today I noticed my 22 week old pullet doing something extremely odd. She later her first egg five days ago but today was the first time I saw her actually do it. I must have caught her at the tale end of laying because she was standing up in her box. In the nesting box there is pine shavings. She was picking them up and throwing them on herself! She would put a piece in her beak and fling it onto her back. So strange! I hope this is normal because I have no explanation for this odd behavior. Any thoughts?