You’ll hate this answer! It varies.
The hog houses in my garden are sometimes completely vacated in spring and sometimes not. Last year they left both but this year one of them has remained in situ and shows no sign of moving. He did a complete refresh a couple of weeks ago taking in new hay so I think he’s here to stay. The other house was vacated but is now back in use again and I have no idea if it’s the same hog.
They set their own rules on this one, usually carefully planned to conflict with any plans you may have yourself.
