I read your other threads and you haven’t answered many of the questions about her. I’m sorry that she is getting worse. The yellow in her poop could be from a reproductive disorder or if it is yellow urates, that can be from liver problems or water belly. The most often cause of those is reproductive or fatty liver disease. In one thread you said you had new girls? How old are they and how long have you had them? Are you trying to take her aside and feed her? I would offer water with electrolytes and vitamins, and make some mushy wet chicken feed plus a little scrambled or soft soft egg. Is there a lot of yellow fluid in her poop, is it yellow and solid, or is it just yellow in the urates (the normally white part?) Have you ever treated for coccidiosis with Corid? That might be helpful, but don’t give b vitamins when she is on that. Do you have any antibiotics, such as amoxicillin that you could use?