I have chicks that I got from a local swap from a popular breeder around here and all of a sudden I have one that is flopping around and cannot walk. I have made sure it is eating and drinking but it has been going on for several days according to my husband. He didn't isolate the chick when it first developed . If it is Mareks then is the rest of my brood doomed? When I got home from out of town today I isolated the chick and got online. Do I just need to put it down humanely or what? I cleaned out all of the shavings in the brooder pen and tried to get as much out as possible (it is on the ground outside) I then put a fresh layer of shavings down and gave fresh water and food. I also elevated their water off of the shavings to try to cut down on the moisture issues (we have also had torrential rains lately). What do I do now?