I have 11 beautiful black silkie 5 day old chicks. I do a good head to toe on each chick at least 3 times a day. Checking for pasty butt and blocked vents or just boo boos. I have noticed on just one hick a hardness that seems attached a ways below the vent. Frantically googling an answer to what was on my chick led me to one person saying it may be the cord site? It isn't attached to the chick's vent, I can tell it is not that. What could this semi crusty thing be attached to the bottom of my chick? Is there anything I should do about it? Any help would be much appreciated.