Please excuse my ignorance. I had 5, 9 week old incubated chicks. One of them started losing his balance. I started him right away on vitamins; probiotics; yogurt etc since 2 weeks ago. He has worsened and now his legs are sitting straight under his body. One to the front one on back, almost as if someone when doing "splits." He eats and drinks good but can hardly move around. IDK what to do. Please help!!!