I have a broody hen that is acting crazy. She will sit on the eggs for a day or two then she sits on an empty nest. I put her back on the eggs when I find her off and she acts like she wants to care for them. She will move the eggs around then fluff up and sit on them . Next day or two, she will be on an empty nest. Whats up with this? Maybe her first time? Or should I put her by herself with the eggs and one nest box?