New chick, is thin black string an umbilical cord?

[Ometra]

Does an umbilical cord look like a very thin black string?

 

[Yorkshire Coop]

Yes it can do. It should just dry up and fall off.

 

[Ometra]

Yes it can do. It should just dry up and fall off.

I appreciate so much your reply. Thank you! I was concerned because it was caught up in a large hunk of white poop, dangling in a way the other chick couldn’t possibly resist! If that string were an umbilical cord, it could be bad. But the poop came off and I’m not sure if the string is still there, which is good.
Thanks again!