I have a sick hen and it is very possible it could be Marek's. I am working with a vet who is doing the best she can to help me. She is wonderful. Not all the symptoms point to it, but not all chickens read the book. I plan to bring my poor girl to the UNH Coop this week for a nacropsy. She is too far gone to make a recovery. Poor thing. If she has Marek's, then all my birds have been exposed. What am I supposed to do with them? Do I wait and see if they get sick and then cull? Someone please tell me what I should do. Thanks so much.