Help! How'd my chicken die like this? (NSFW, no gore/blood, dead chicken depicted)

I went outside today to find my poor, beloved hen Honey dead today. She was an old hen who definitely developed a few health issues in her old age, but I'm stunned in how I found her body. I am almost certain she died of some natural cause or possibly an illness I didn't notice, but in all my years of chicken rearing I've never seen a death pose like this. Does anyone know how this position could have happened and how it could have related to her demise? I'm heartbroken. I'll always remember you, Honey; my sweet old lady. Rest in peace, sweetest bird.