Just picked up these 2/3 day old silkies from a hatchery and I've never had chicks before. Researched a bunch, but wanted to ask you guys. Do you think this is a dried up umbilical cord or pasty butt? I tried with warm q-tips and it is pretty hard, it looks like the vent is moving in an out slightly while I gently wipe. Also the chick seems to be fussing around the bum alot