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.

The thing is that that actually is the boars fault. Mobs aggro towards other mobs. The boars react to the troll just as the troll reacts to them, agressively. They actively aggrevate and distract the troll and move as closely towards it as possible. Wolves will even bite through walls to get at the troll, at least they have good chances in a group but it still isn't ideal.