Bad news this morning. I went out to the chicken coop and found a hen dead. She hadn't been pecked, it looked like she just laid down and died. I had noticed this same chicken a few days ago, because she was missing quite a few feathers on her belly. I decided to keep an eye on her, I thought maybe she was just going broody or maybe molting. Now that I think about it she had been staying in the coop a lot. I would find her just sitting on the top roost in the middle of the day. It's too late to save her now but I want to make sure if she was sick or something that my other chickens don't get sick too. None of them are acting the way she did or are missing belly feathers. Anyone have any idea what may have caused her to die?