I know my flock has Marek's. Reading everything I can on how to manage them. They look great--most of them anyway--but there are two that will definitely need to be culled this week. It's so sad. I'm not against culling and I process them myself, but just knowing what I know now about the lifespan of this virus, it's almost indestructible nature, and the implications for my other birds...sad. Anyway I do appreciate you taking the time to publish this. Blessings upon you.