Hello chicken lovers! I have a small backyard flock of three hens, 18 months old, that I ordered from My Pet Chicken. We got them vaccinated for Marek's, and they have been quite healthy, although they are molting right now. I have wanted to add a couple hens because I enjoy them so much and we have room. I found a couple adult Amercauna's from a local person who is moving. She said these birds have been healthy, but they were exposed to Marek's a while back and obviously survived it. If they appear healthy, and my chickens are vaccinated . . .is it safe for me to get them? I would quarantine the new girls as long as I can, but they would be in the same yard so I'm not sure how effective it is. I really don't want to harm my hens, isn't this what the vaccination is for? It seems really complicated to get more hens without having some kind of problem! I hate that!! thanks for any guidance, I'm still a newbie I guess!