Penelope11 day old chicken. Querry hen. RIR. Bought from hatchery as fertalised egg. 13 other chickens bought from same hatcher. All others appear to be healthy to date. Symptoms: Drowsy. Remains eating and drinking well. Watery faeces. Ataxic movements. Walking backwards. Curvature of neck and head pointing towards the ground. Seems unable to look up on own without assistance. Onset of symptoms two days ago. Worsening of above symtoms over 24 hours. Penelopes symptoms for the last 24 hours have remained the same. Photo of penelope. Unsure of diagnosis. Unsure of what to do. Any advice would be appreciated.