I'm not sure what happened to this little chicks, for weeks it was running around with its siblings and my 4 other chickens with no problems. We brought it home along with its sibling because the weather was crappy and one of its siblings had already died because it couldn't make it back inside. Now this chick won't walk. It can move a little on its own but it keeps it'd body close to the ground and won't stand tall. It's legs don't seen injured but I'm not sure why it suddenly would stop walking when all the others are running around like crazy? Any suggestions on how to help this little fart?