I have been raising a baby chicken and at about 3 weeks she or he started falling over and only walking backwards plus panting. I read it could be vitamin issue so I bought recover 911 and poultry cell. It seemed to be working but today she has started shaking her head violenty and kicking with her back left leg at her chest while falling over. Any ideas on what to do? I fear she may have a respiratory infection due to the head shaking and panting. She has been alone in a seperate crate.