My 4 month old chicken presented with knuckling on her left leg a week ago. I took her to work and we crated. Nothing broken and we came up with a plan. A week later she is not improving and it seems to have spread to her other leg. She is still bright and eating and drinking. No diarrhea. I separated her as soon as I saw the supposed injury. None of my other birds are showing any signs of illness… what are my chances of my other birds getting it if it is Mareks disease? What are the disease progression signs of Mareks diisease? She doesn’t appear to have any other symptoms other than her legs. My chickens have always been healthy so I’m in a little bit of a panic. Thank you so much.