I have a batch of 51 Freedom Rangers, 15 days old. They all arrived healthy, and did well until 2 days ago. When I went to check on them Tuesday morning one chick was walking on it's ankles, toes curled up. I moved her into a separate brooder so she wouldn't get picked on. My Chicken Health handbook led me to the conclusion that it's curly toe paralysis. I'm feeding an organic starter/grower 22% feed, produced locally. I went and got some Fertrell Poultry Nutri-balancer, and supplemented all the feed with it at 60lbs/ton of feed. The Nutri-balancer contains all the riboflavin that a chick should need, plus the riboflavin that was already in the feed. I figured this would fix the curled toe paralysis. By Tuesday night I put 2 more chicks who were starting to show signs in the separate brooder. By Wednesday night the first chicks legs were stretched straight back behind the chick, toes straight out. If I put her legs under her she flaps around until her legs are behind her again. She is still eating and drinking from what I can tell. Her crop was full once when I checked on her. This morning (2 days since start of trouble) The first chick was the same, legs back and the other 2 chicks looked better, standing up correctly, moved them back to main brooder. I gave the crippled chick polyvisol this afternoon. So the question is: at what point is curled toe paralysis permanent? How long do I let her suffer? She seems to squawk loudly once and a while, when she is trying to move around. Her legs are getting raw where they are in contact with the pine shaving bedding. But most of the time she seems relaxed. What's the best way to cull a chick? This is the first time I've ever raised chickens. Thanks!