Hi char2020
Glad to hear you have had lots of hog activity.
It may be that the female is young and the males aren’t interested. Although I had one female here, who seemed to do her best to attract the attention of the males, but they weren’t interested. Not really sure why. She was an adult female. I sometimes think it’s pretty amazing any of them end up with hoglets at all what with that and all the time they spend circling!
But where the hogs come in the pecking order doesn’t seem to always be related to size. Sometimes quite large male hogs will always roll up – maybe they just think it’s easier that way!