Looks like you cut through a pin knot? If your try to get below it you'll worsen the problem.
I would also add super glue. Then I would I do a wrap of some sort. Use sinew or rawhide set in hide glue.
You could also use some silk or linen set in epoxy. Then wrap with a decorative thread. Add a strip of fur all around and then add fur to the corresponding area on the other limb.
Jawge