I have a three-year-old RSL hen who has been acting very lethargic for the past several weeks. She has not laid for perhaps a year, and when she did, she often laid soft-shelled eggs. She stands around most of the day with her head tucked in, but does eat and occasionally preens herself. Her abdomen is very swollen and she has difficulty pooping. At first I suspected that she was eggbound, but after soaking her in warm water, palpating for eggs, and searching for obstructions through the vent, I no longer think it is a possibility. I isolated her for a few days and fed her yogurt, olive oil, and such, but that didn't seem to help. Now I think she may be laying internally, and I am on the verge of culling her since she seems to be miserable, but I am hesistant because she does not seem to be getting worse. Also, I read that internal laying kills relatively quickly, but she has been this way for many weeks, and still seems well enough to eat and drink, and I rarely see her lying down. Two other things I have thought of are worms (I have not wormed her for some time) or coccidiosis (which I have had a lot of lately among my chicks, but I don't know if adults can get it). Does anyone have any thoughts on what it might be? I would really rather not cull her until I know exactly what it is and whether I can treat it or not.