I am new to raising chickens, so I may be worrying too much, but I have a young hen that has not laid an egg in 4 days. She is a Buff Orpington and is about 8 months old. She started laying in July and has been a very regular layer. She spends a lot of time in the nesting box, so I thought she might be broody, but is she too young for that? There are no obvious signs of distress or illness and when I make her get out of the nesting box, she runs around normally with the other chickens. I have seen her eating and drinking, so that is not the problem. Any thoughts or advice?