I got 4 new French Black Copper Marans yesterday! *my first chickens,.... ever!* One of them has something that looks like its sticking out of its butt. I was thinking it either had eaten something, and will not completely come out? Or that its where the Yolk Sack was attached and this will fall off? It almost looks like a dried thread about 3/4 of an inch long. I gave it a little tug, but its still there. Should i go ahead and try to get it out or will this fall off or come out on its own. Sorry I have no pictures, or a clue!