She is about 5 years old. She rooms with three other hens who are the same age. All were brooded together. They live in a large converted dog run and normally get a few hours a day of free range and table scraps in addition to layer pellets. I have never had any health problems until this week. I was away for three weeks and they were confined to the run due to the fact that the house sitter has a dog. When I got back, I noticed that she was drooping and had runny, green looking poo. Due to the wet weather, I assumed it was worms and got a bottle of Wazine and administered some to the entire crew. Sadly, my BR is still looking bad 24 hours later. She is not eating much (I give her yogurt and other soft foods 2-3 times a day, but she is not interested in the pellets). Her tail is hunched down and she is a bit unsteady on her feet. She has no bloating in the abdomen and her crop feels empty. She does not have any nasal discharge or respiratory symptoms. She is very thin. She was having greenish watery poops, although she had one that look healthy today (that might be because of the special diet she has been on for the past few days). She does not stay on her feet or move around much. She has been in the coop until tonight. I didn't think she was contagious and she was not being bullied by the other girls. I thought she would be happier with her friends. I have finally moved her inside due to the fear that she has something catching (everyone else seems fine so far), and the fact that the wormer, electrolytes and yogurt did not seem to help. Any ideas on what to try next? I don't want to spend on a vet if I can help it. Should I give an antibiotic a shot? Try another more full spectrum wormer? Could it be an internal problem? I thought maybe egg peritonitis, but I do not feel anything in her belly.