Hi lewisdad
I think a little overweight is a bit of an understatement! Even the ones I released here in the past, who I sometimes used to think looked a bit like queen termites, weren’t as big as that! No wonder they weren’t hungry the first night. It is still possible, though, that it’s pregnant as well – difficult to tell.
Very enterprising of it to make a nest. The hay might work to save the lawn, but hogs can be very particular about what they use and don’t always use what we want them to! If I were you, I would try to leave a selection of different materials nearby. The hog here who made a nest used mostly dry leaves (they prefer medium sized ones – weigela ones got used quite a bit here because there was a bush nearby) and long (ornamental type) grasses. But he also picked some fresh green leaves as well.
