My first sudden death of a chicken. I have no idea what killed her. She was a brown rose comb leghorn. Found her stiff in the coop this mourning. All the other chickens are fine no runny poop. And she showed no symptoms last night when I put them up. They free range all day. The past three days especially two were very cold low 20s. But that's never effected my flock. I have good ventilation and shelter. I don't know if maybe she fell of the perch when and broke her neck or what. Maybe she was sick from the cold even though it warmed to the 30s last night. I examined her no blood no wounds nothing. So I'm stumped all the other chickens are free ranging now and are fine. So I have no idea what could have killed her. I'll keep a close eye on the flock for the next week or so. But I'm just curious has anyone else just had a unexplainable death. I gave her a proper Burial this mourning. I didn't want to eat her not knowing what happened. So hopefully the rest of the flock is fine. Also I have not introduced any new chickens to this flock. So any CSI people are welcome to give me ideas on what could have happened. I checked her over no lumps or pecking marks. I'm just stumped.