Your people's wanderings have brought them to a fertile land bounded by steep-sided fells. In the towering forests lurk wild game which your people hunt for food.
In Bjornfell, berries have been replaced by wild game: bear, deer and pheasant. The bear live in the forest and once hunted, will not return. The deer and pheasant will replenish after hunting, the deer in the forest and the pheasants in the meadows. Farms and buildings will destroy their habitat and stop them from respawning. If you want to keep hunting, make sure to preserve some forests for deer and meadows for pheasants. These animals will not colonise new woodland, but will only live in old growth forests.
The Hunter's Hut becomes available from the beginning of the game and can be used to hunt wild animals or boar. The hunting zone has been removed and hunters will roam the whole map looking for food.
Place Bjornfell last in your mod list to make sure that it overrides any previous mods that affect berries.
I recommend using the Terrain mod to allow access to the tops of some of the fells.
Sadly, animations are not yet available for the animals. They suffer from a sort of paralysis which prevents them from running away when being hunted. Or perhaps they have never met humans before and don't know to be afraid...