Long story short: I found one of my hens yesterday unable to walk, and after spending the night at the emergency vet, it’s been determined that she most likely had Marek’s. She passed away in my arms earlier this afternoon. I have two sebright pullets, about 12 weeks old, who have not been introduced yet to the flock. They are living in an old coop on the other side of the property (about an acre from the other infected coop), though without knowing Marek’s was present in my flock, I haven’t been practicing any biosecurity. They’re unvaccinated (as is everyone else in my flock). My question is... should I sell them? They may have already been exposed but if they haven’t, I want to at least try and save them by sending them somewhere safe. I know sebrights are particularly susceptible to Marek’s and I’m worried that if I keep them here, they have zero chances. But I also don’t want to give away doomed birds.