My flock consists of: (1) EE Roo, 3 years old (2) Americauna Hens, 3 years old (1) Barred Rock Hen, 3 years old (4) Americauna/EE Pullets, 5 months old Until yesterday, I had (1) Buff Orphington Hen, 3 years old who mysteriously died, and a handful of Americauna/EE Roos, which I gave to new homes. I have never vaccinated my flock. I started in MT, and got the 3 year olds as day old chicks from Murdoch's Ranch & Home Supply. I moved to CO in the past year and a half, and recently hatched the younger chicks from my own flock. There was a flood her in CO about 3 months ago, and I was evacuated from my home. I took all 16 birds with me on a helicopter, and relocated them to a barn about an hour from my house. They had been staying in a large stall in the horse barn, but they were previously accustomed to free ranging in my yard all day. It's been hard to manage my flock - people take eggs from them, and I don't know who is laying, and who's not. I can't monitor behavior because I only am able to make the trip to the barn 2x a week. That being said, I was able to bring them all home yesterday. They are currently free ranging in my yard. But this brings me to my concern. My Buff Orpington hen was sick on Thursday morning, so I brought her home before I brought anyone else. She passed away Friday morning. She looked very weak, had trouble walking, slept all day, acted Egg Bound, but someone mentioned Marek's. When she finally died, she was lying limp on her side, eyes closed, just breathing. Very sad. Now I'm concerned my flock has whatever she had. I've relocated them to my house in the mountains (they're back to free ranging now, and their old coop, which I never had issues with before). I'm thinking that the inability to free range for 3 months really hurt their immune systems. Not to mention there were 16 birds in a stall together. As I mentioned, the young roos have been rehomed, so now I'm back to 1 roo and 7 hens in my yard. What should I do? Should I vaccinate for coccivac and marek's? Is it too late to save them, if that's what my Buff Orpington had? I read a thread already that was 17 pages long, and it just made my head spin. Also, isn't there something I can add to their food or water also to help with this? I read that in the other thread, but like I said, it was too long for me to remember!!!! Please help.