I have 5 very healthy free range chickens and they are all about 3 years old. This morning I found one of the Rhode Island reds dead on her roost. She was fat, healthy and it doesn't look there were any injuries on her or any stray feathers around. (no sign of a predator). It looks like some "throw up" was around her beak and possible some diarrhea around her tail feathers. The temperature last night was normal, around 45 to 55 degrees. No storms. And the other 4 chickens were fine. Does any one know how she could have died? Is it normal for chickens to just keel over at the young age of 3? Could she have choked? If anyone has any insight - it sure is welcome here. It's heart breaking - they are like family members. So it sure would be nice to have a possible answer so we can avoid it with the others. Thank you.