Well, just got home from school, went to check on the chickens and in the hen house I found one of my 4 adult hens dead. It was sad, there was no sign of external damage(i checked extensivly) she looked like she had just collapsed on the top roost. My guess is from a heart attack. All of the others are fine and come right up to me so I think it was just her. Any ideas on what else it might of been? Anything would help at this point. Im going to Tractor supply to get some disease preventatives.(Just in case)