No. Although our hogs are often still reproducing until late summer, they are usually all done for the year by September. Their main breeding season here is the springtime, starting around April until June.
During October they are beginning to hibernate for the winter, usually depending on the temperatures. Tomorrow we'll be in November already
Is the little door on that side of the garden? Have you got neighbours on the other side too?
As for the continuing work on the first side - if that's the garden they're going back to, you cannot really know what might have upset them there. It could well have caused them to become very unsettled, but if that was the case, surely they would have wanted to remain on your side of the fence