I think I have a case of Mareks, but I am not sure. I have looked through the other posts, and it seems to add up. Another opinion or 12 would help. I have a rooster, about 6-8 months old, large fowl, who has come down with something. He was fine last week, not good this week from about Thursday. He is limping, feathers drooping, loosing weight and generally not active. He is also pooping green water, no solids. He comes down from the coop, and then goes back. He has not crowed in a week. He has no interest in the hens. Little interest in treats. The very bothersome thing is that this happened to another rooster, from the same line, about 2 months ago. They were the same age brood mates. I had to put him down. Once he got too week to stand, he did not get back up. Very open coop. Free range. No other health issues in all the other chickens. I have given him a few days of anti-biotics and some Liquid Drench. I also gave him some Rooster Booster today. My intent is to figure out what this may be, Mareks or not. Also, is there a cure? Is he a carrier? Should I put him down now?