Hiya, Jenny and welcome to BYC! :frow
Back in the day, becoming a marine biologist was a dream of mine, but then I wound up being a cop so there went that idea lol.
I'm down to 3 hens in the breeding pen and got 3 eggs two days in a row. You'd know that was rare around here if you'd see me all excited running with them into the house to show the hubs!
I'd honestly leave it alone as it's a lifeline for it. The "umbilical cord" will shrivel up, dry, and just fall off on its own. Keep the poor thing warm though. @KathiQuacks is another one that might be able to help.