Long story a little shorter. We just began keeping chickens in January. Initially we bought 6 RIR, the. My nieces wanted "zebra chickens" so we bought 4 barred rocks from the same individual a month later. Well we knew one of the rock hens was older. She had a defined comb and waddle, was coming out of molt and was bigger. She laid the biggest eggs of all and within the last few weeks has been laying eggs with a weird ring, like an egg with a spare tire. Off course the pic doesn't do it justice. Well, we had a hen go broody and we hatched 5 chicks two weeks ago. This older hen laid an egg yesterday and went into a nest box this morning and stayed all day and wouldn't roost tonight, so I thought she was going broody. I had dreams about chickens and chicks and remembered I had the coop fan on (temps are dropping tonight in south alabama). I woke up, went out and cut off the fan, checked on the hen in the nest box and she was dead. Just wondering if anyone else has came across this before. Was it natural? Do hens sometimes lay weird eggs before dying? Was she sick? She seemed just fine, laid almost everyday, always eating and scratching, acting just right. Then she got in the box all comfy and died.