I have a Jap cockeral that is 6 months old. Last week I noticed that he became blind in his left eye. This caused him to look up with his right causing him to crain his neck. Now when he tries to do this he twists his neck so far he falls over backwards. I do not know what to do. I am tempted to remove him from the flock. I dont want it to be a spinal disease or something that can hurt my others. Please comment.