Yesterday, my little boy went out back to let the chickens out to roam the yard, and found JuneBug, my pet australorp, dead in the laying coop. She was only three years old, in apparently excellent health, and laying every other day or so. She already had rigor mortis, how long does that mean? I am really tearing myself up about this, even though she had shade, water, and food, so what could have happened? Her feathers were shiny, she had the hugest brightest comb, and tons of spunky chicken attitude. What could have happened to my beloved hen??????