I have a 7 year-old RIR hen that is one of 2 that remain from our first venture into the world of poultry keeping. I had been wondering if all was okay since she seemed to be less energetic and less social than previously, but she was eating and otherwise seemed fine. Last night, she did not go to roost as usual, but crowded in a nest box with my broody hen. This was odd, so I checked her. She has a distended abdomen (feels like fluid distention) and a bad smell about her. I haven't had a chance to check her over carefully, but can see a pale white/yellow material on her feathers below her vent. She did muscle in for her share of bits of meat from a cooked turkey carcass this morning. No respiratory or neurological signs and good feathering. I think she has been kind of thin for a while. She is one of 11 standard hens - 2 are 7 yrs old, 9 are 5 yrs old. Kept in a dirt floor, open-air coop at night with lots of space. Fed layer pellets and water, with occasional snacks of leftovers from the house, plus foraging. Essentially free ranges during the day. What are your thoughts on possibilities? I don't know whether she has been laying or not - have not seen her in a nesting box for a long time until last night.