Originally posted by Polonius Ulf:

I have almost convinced myself that time does not pass for my boars unless I am present. I moved all of my farming operations, including tree farming, to the boar farm, built elaborate defenses around the farm, and so on.

If it turns out that I need to sleep with my boars, I am going to rename the farm to "Dogpatch."

Best solution to that is making a breed tower near you base or where are your boars , make them a real secure place to breed
And yes , you most be near the area to start breeding