Help! I have a almost 5 month old chantecler pullet that isn't really moving. She seemed fine yesterday, but today when I came out, she went to run away from and fell over. There's not sign of external injury that I can find. There's a little bit of excrement on her feathers near the vent, but not a lot. What can I do to give her a better chance of pulling through this. I'm still very new to chickens, and I have no idea what to do!