We have a 3 week old chick that has become weak and lethargic over the past two days. this morning its legs look a bit dark and, for lack of a better description, shriveled. As I was attempting to get a pic of its legs to post, a clear liquid bubble dripped out of its beak. Stools are mostly clear liquid. I cannot find any illness descriptions that seem to fit. List of symptoms: Weak, holds wings out, sits in corner, stumbles, clear liquid stool, legs deteriorating . . . Help Please!