Hi, I have one of my chicks that isn't doing well. Her right leg is very weak. She can walk a little then the leg trembles and she falls down. Physically it appears fine to me, but it quivers when you hold her. Just that one leg. She sleeps a ton. She does eat and drink a little, but nowhere near as much as the others. When she puts her bum leg down she lifts it a little (off the pine shavings) like it hurts. We have her secluded from the others and spoon feed her starter food and water with electrolytes. Is there anything else I should be doing? Do you think she can outgrow it? If it is Mareks , how fast does that spread to other chicks? I had one die the day I bought her. She just started heavy breathing and keeled over and died. The other chicks are doing really well though. I figured if it was mareks it would have wiped them all out? They were supposedly vaccinated for Mareks, however.