I have a small flock (4 chickens). One of them is a White Leghorn that just this morning was completely fine, laid a nice egg yesterday and untill noon today was completely healthy with no signs of anything amiss. At lunch today I noticed that she was laying on the ground. I found that she can move her wings and her head, but her legs are completely lame. Her toes are curled up and completely useless. Any ideas on what could possibly have happened? Also, she is normally very skittish and today she let me pick her up, which is very odd. No evidence of a racoon or anything like that and the other chickens are perfectly healthy also. Any help would be appreciated!