Originally posted by sarteck:

Originally posted by TVMAN:

build a barn, put boars in barn, close barn door, problem solved

edit: believe it or not this also works for chickens. amazing, i know

Problem not solved, though. Raid trolls will go after your boars whether they are "inside" or not. Try it; build your barn, then spawn in a troll raid with console commands.

I have. My boars are in a barn and trolls don't go after them if I am within their perception range. If they can't see or hear the boars they won't go after them. That means that you have to keep the trolls far enough away from your barn that the boars won't alert.

I've handled many a troll raid without losing a single tame boar.