So I had nine chicks hatch out Friday, and the ninth came out with some unabsorbed yoke. Well here I am on Tuesday and everything seems fine except that one little chick still has this black crusty thing on its backside. (Kinda like when you cut a babies umbilical cord and it turns black and crusty and falls off. This is the first time I have had this happen, should I wash it and try to get it off ? or should I just leave it be ? I just dont want to do the wrong thing here, since this is the first time this has happened to me. The chick was born Friday and is now 4 days old, Its eating and drinking normally, I have not witnessed it use the bathroom (Although the brooder gets messy awfully quick so I am assuming it is using the bathroom ok) It walks and sits down normally and not awkwardly as if it were hurting her. It just has this black gunk and a bit of shell stuck back there.