I think my 3 week old chick has Mareks disease, and I lost another one to what I believe to the same thing 2 weeks ago. I have 5 other chicks is there anyway to prevent them from getting it. I have separated the sick chick from the rest of them and them seem fine so far but I’m terrified they will soon develop the illness as well. I got the sick chick and two others from a hatchery and the other 3 I got from a nearby farm if that changes anything. They are inside but I take their old bedding outside in a compost bin a few feet from my chicken coop should I be worried about my other chickens contracting the disease? What about when it comes time to add the new chickens to the coop should I build a new coop altogether or can I put them in the pre-existing coop?