8 days ago I went out to my chicken coop; I intermittently allow them to free range in my backyard. So when I went to pick her up to bring her to my backyard, she attempted to scurry away. At this time I noticed she was unable to stand and had no coordination. I got a hold of her and calmed her down, then I quarantined her. I have been giving her tons of vita water, and food. she is about 6months old she has been vaccinated for MDV. 6 days after finding her she was able to stand again. she is now able to walk and move around freely which is very encouraging. she has only laid one egg in the last week. I am wondering what the chance is she has Marek's Disease and when or if it will ever be safe to re-introduce her to the rest of my flock. thank you for any information you can provide me. also if it is Marek's Disease will freezing weather kill the virus?