Two of my father's buff orpington hens have gone broody. They were hatched on April 25 and they just started laying the first of September. So after laying just a month and a half, two are broody. Is it normal for hens that young to go broody?? I've had lots of experience with broody hens, but none of mine have ever gone broody right after they first started laying, so I was just curious. Thanks!