From PC Gamer: “They may be a small threat early on, but a Valheim boar can be your friend if you play your cards right. These feisty little pigs may have a short temper, but if you manage to tame them, you’ll have a steady supply of leather scraps and meat. If you dream of becoming self-sufficient, you should work on setting up a farm to accommodate these wild creatures as soon as possible.
Taming a boar also means that it’ll eventually grow to love you, which is very sweet. You can even breed these animals to make way for little piggies. So here’s how to tame a boar in Valheim, breed them, and score a few boar trophies in the process.
Source: N4G PC How to tame a boar in Valheim