I got 4 Easter eggers from Theisens and now they are 12 days old. Just today I noticed that one of them was twitching its head. I looked it up and was brought to this disease. One of the other symptoms of Avian encephalomyelitis virus was sitting on the back on the back of its legs. I had noticed that they did this a few days when I got them. They usually do it only for a few seconds or while they are eating. The first time I saw one of them do it was when I was taking pictures of them, so I will put a picture to show you what I mean. Do you think that my chicks have Avian Encephalomyelitis virus? If so what should I do? I have six other grown chickens in the coop that i was going to add these guys to. I do not want to get my older birds sick so should I not add them? Will they make it if the have this disease. Any help is needed!