I also have a chicken with what seems like some sort of vent blockage. She is very lethargic and I washed the area off yesterday. It is really smelly and yellowish with cottage cheese looking parts. Today when I left for work she was in the nesting box. She was still there when I came home! So I brought her in the house, gave her a warm bath. I massaged her tummy and back area gently. It was soft not hard. I have her in a large dog crate now, with yogurt mixed with olive oil, and water with apple cider vinegar in it. I put a hot water bottle wrapped in a towel into the crate with her. I actually placed her onot the hot water bottle and she stayed for a very short while. Now she is milling around, not eating or drinking and not sitting on the HWB. For several days she has been withdrawn from the group and when I washed her off yesterday, she was not difficult to catch. Her comb seems okay, maybe a bit darker on the tips. There have been soft shelled eggs in the coop. I have had this occassional problem with my Arucana, but these eggs were light brown and this girl is a Buff Orp. I just noticed she pooped a yellow fluid in her crate just now. So I guess my next step is the glove and oil to see if she is egg bound. If she has egg peritonitis???? I don't know, she is a bit swollen, still has feathers though. She is spongy not firm in the abdomen. I am very worried about her. She is the second best bird we have had. Our first brody bird, Nesty we lost to a coon attack with three others. This is our Buff, she is the queen and now she may be dying???? I am so worried.