Hi Helenafiona
It’s very difficult to know from the limited evidence whether it’s a mum with babies. It would be useful to know what it’s doing at night. It doesn’t sound especially like it to me, although I suppose it is possible. But it isn’t surprising for a hog to block the doorway with it’s body – it might just be that’s the part of the box it has chosen to settle down to sleep.
I’m guessing that you are leaving food out at night as well? Although I’m puzzled as to why you are leaving food out during the day. Is that something you are in the habit of doing? Also, where is the food – is it close to the box where the hog is? Also how do you know it’s coming out a couple of times a day – do you have a camera, which might also be able to record whether it’s coming out at night.
It may just be a question of waiting to see whether any hoglets materialise.