@JoePo - I welcome your opinion, and I am disappointed that people jump on you for posting your thoughts. I had a chicken with Marek's Disease. Before I know it was MD, it spread to another chicken. After trying for over two weeks to get them better, but to no avail, my husband had to cull them. I personally couldn't do it, but I am thankful that my husband was strong enough to do it for me. He didn't like it but still did it because it was necessary to stop the disease from spreading.
We had to clean out the cage, threw away all the things used/touched by the sick chickens. I'ts been a month, but we still block off the area where the sick chickens were kept just in case a few feathers remain somewhere. I read that the MD virus can live for up to 6 months, so we are going to let the sun kill the nasty virus for us.