I'm embarrassed to admit this, but I always assumed a fecal transplant went in the other door

EDIT: looks like I was right, it can be done that way: https://en.wikipedia.org/wiki/Fecal_microbiota_transplant#Me...

No embarrassment, I thought the same. Feels like a far more sensible thought than fecal transplant via the mouth, for many reasons. Vindicating edit!