Hi Corey,

this could be a puncture wound?
or
could be a tape worm? Has he lost weight , despite eating well?

I'm sure you have isolated him

prepare an intestinal fecal sample for the vet as well

( time for you to get a microscope ! )

feed him well !

I believe , if it is a tape worm - they do better without sutures after it's removal

Let me know !