Hello, and welcome to BYC.
You can go to the Forum for Emergencies and medical illnesses, and describe the symptoms your chicken is showing, along with her age, eating and pooping information, and pictures if possible. The experts can probably give you good advice.
Hi and welcome to BYC. I’m sure the ER experts will be able to diagnose the issue. Chat with other BYC members nearby using the links in my signature, below (turn your phone to landscape to see them).Make yourself at home and enjoy the forums.