I just got home from work and went to feed and water my nearly 2 week old chickens. I feed and water them at least twice daily and feel I've been taking care of them but tonight found one dead and one just laying on it Brest with legs out behind it unable to move. Another 2 or 3 in a similar state and some moving around on their legs but their legs don't seem to be moving properly. Anyone know what is happening to these birds?? They are Cornish X rocks. I have 50 of them in a 4x8 space right now as chicks. Please help me to know if there is anything i can do to help them?