I had a chick that was born three days ago (December 2, 2013). He had a black stringy thing hanging where his umbilical cord should be. My Grandpa pulled it off, but now there is this black thing in the area. I'm worried. Is this bad? Will it fall off? Sorry I'm asking lots of questions. This is my first chick that I've hatched. EVER! I only had this guy and another egg hatch. Please help. Here is a picture. Sorry you can't see it well. Also, he took a while for his feathers to fluff up. Does this relate?