I have not had this done, but a dear friend had to have one of her males that continued to get blocked a surgery that essentially "replumbed" his system. To the casual eye he would now appear female, but it did end the blockages because the openings are bigger. Peeing issues ended and it was much less expensive than repeated hospitalizations. He continues to be on special food, but it did work and it might be worth discussing with your vet to see if it is feasible.

Barncats can live healthy happy lives, BUT (and it is a big BUT) if he is joining an existing colony of cats, care should be taken in introducing him.

You might want to check out the Cats International website... Betsy Lipscomb is the founder and she has done lots of good work with cats with potty issues...

Good luck to you and Levi....

(Is there any way he could become a cat on an enclosed porch or run?)