Sleeping on the side with one leg out looking like a "not live" chick is pretty normal. It has scared me a few times and every time I make one wake up because I am sure it is gone, I always think of Shirley McLaine in Terms of Endearment when she pinches the sleeping baby because she is sure the baby is dead.
![wink.png](https://www.backyardchickens.com/styles/byc-smilies/wink.png)