I have a 7 week old barred bantam chick and she can't stand. I checked for the pupils, all are normal and the eyes are a normal color. No sneezing, or blood in the poop. She is still active, but it looks as if she got trampled by the others.No other chick is like this, she is the only one, the others are still happy and moving around good. She peeps good, drinks, and eats, but her legs are a little lamed down so she doesn't move very much. Is this Marek's, or has she been injured from the others? I have an accidental large fowl chick in there that the hatchery gave me, so I would reckon she could've been the one to hurt the bantam. The hurt one has only shown this when I got home, she wasn't like this earlier today. Edit: I also isolated her just in case with food and water.