I have a three month old chick that is not able to really walk or use most of her body. She is sleeping all the time. This happened suddenly and has been going on for about three days. If this is Marek's, how long will the poor thing last? I do not believe in "culing" my birds but I don't want her to suffer. Is it at all possible that it's not Marek's? Also what I am really concerned about are her brothers and sisters (5 other sebrights and 1 Americana mix). I got them all from the same place and they have been living together since I got them. If she has Marek's, what is the chance that they all have it? How can I know? I'm in Florida and it is warm enough for them to go live outside with my big kids (3 grown sebrights), but I don't want to put them together if there is a risk of my healthy adult chickens getting sick. I am heart broken over this so please don't be rude and tell me to cull my birds. But I will do what is safe for my grown ones and give the best of care to my new additions. Thank you!