It should go away on its own.

I have had bitches pull out the umbilical chord in pups ... and some intestines came out with it ... where I had to take the pup and struggle pushing the little slippery guts back in the little hole (which was not easy!).

Even though I succeeded, there was a gaping hole remaining, which I had to treat with betadine. For several days I had to continue to make sure the gut didn't come back out, but after awhile the hole closed and everything was fine.

Jack