I have three Cornish Cross chickens and two of them seem to be doing just fine. But the three isn' t walking around like he should be. He stays in one place and does use his legs at all. I heard that Cornish Cross chickens can have leg problems, but I don't know how I can help him. Or even if I can help him. I make sure that his food and water are close enough to where he can get them if he wants to. He eats and drinks but he just doesn't walk. What is wrong with him and what can I do to help him?