Yesterday afternoon, I found one of my barred rocks wedged between a wall and some bricks. She was upside down with her head in the wet dirt and appeared to have suffocated. She had broken a leg six weeks earlier, but we treated that and she had been up walking around during the day. We had sectioned off an area just for her because the other chickens were picking on her. When my husband picked her up, she had dirt caked in her mouth and down her throat. I told my friend about it and she replied that she had heard from her grandma that chickens sometimes do this. Can anyone explain this to me? Have you ever seen this? Specifics: she was a three year old barred rock, she was on the mend from a broken leg and walking around, she was isolated from other but still inside the coop area, had plenty of food and water and just had some corn on the cob that morning, it was 100 degrees outside, but she was in a shaded area with a large fan circulating in the coop, she had water to walk in, and she had laid an egg that morning.