I have a brood of chickens and yesterday I went to check on them and found one of them laying on the floor. He was alert and if i put food and water to his face he will eat and drink. His legs done work... he just lays there on his chest. He can't move to do anything. I have put him in his own cage and I have added electrolites to his water. Please help!! if you have seen this before .. please tell me is there anything I can do for him? No other chicken in the same cage has any problems. It just happened over night.