I came home to find one of my buff orpingtons dead. She was laying down on her fenced in area and just didn't look right. I checked her over and there is no blood. She has access to clean water and food. She was not acting strange and laid an egg yesterday and today I believe. She was 5 months old and my first chicken to die doesn't help that my 6 year old found her. Should I be worried? Does this just happen or was she ill? Should I throw out the eggs I've collected from her this week?