Hi Keith59
It sounds as if the hog stayed in the hoghouse longer than some! Normally they would move nests to avoid a build up of parasites. But he may be exploring another part of his range. But also if he is a young hog, he may be moving to a slightly different area.
I think you are doing the right thing continuing to offer food and water. If there is one hog around, there are likely to be others, so if not him, another hog may visit.
If you are sure he has vacated the house (which it sounds as if you are), and no other hog has moved in, I would clean it out now. Best to use boiling water to kill any parasite eggs which may be left in there.
Good luck. Hope you get another hog visitor soon.
