I have also read that they prefer having just one entrance to their nest boxes (unlike rats, foxes, badgers and most other creatures, who like having multiple exits to their burrows). I think Nic was referring to feeding boxes having two entrances? Hogs will often encounter each other at feeding boxes so there’s more possibility of conflict, so a second way out isn’t a bad idea.
Nic, I know what you mean about hogs and their choices- I have a very large adult in my garden who regularly puts away ridiculous amounts of food, who seems to have taken up residence in the smallest hog house I have- it’s about 30cm across but it’s a cylinder laid on its side, so has less space than if it had corners. Not that the hog seems to care. As long as they feel secure, that’s the important thing.
In other news, I am pleased to report that this summer’s hoglets have finally put some winter weight on and seem to be almost visibly growing. I’d been worried about them before as they’d stayed pretty small, but at last they seem to be bulking out a bit.