Should I be concerned? She's been limping for the last three days or so. She's eating and drinking okay, but lays down for most of the day. I don't see any signs of blood anywhere and it doesn't appear to be broken. She does put weight on it, but is definitely careful. I've felt all up and down the leg, looked at the toes and just don't see anything wrong. I did isolate her for a day, but she was so disconsolate and her chicken buddy (we have two of each breed) sat outside her pen and cried too. So I put her back in the pen with the rest of the group and the two of them are together almost full time. It's like the healthy one is protecting the lame one right now. Do chickens sprain their legs/knees/toes whatever? Is there something we should be doing, or should we just let nature take its course and see if it heals?