Share 'Mystery illness?'

Hi, I recently had a hen die of a mysterious illness. At least I assume that's what she died of. She had reddish brown flat, irregular shaped scabs that spread over her comb and wattles and she seemed tired and didn't stay with the other girls, spent lots of time laying down. Then her tail went down instead of the normal cocked up tail attitude, and her "friends' shunned and bullied her. Final ev…