Its for the coal , they really drop a bunch of coal if u got 2 or 3 geysers conected with portals ( like worm holes ) , one can save like half of the time cutting trees and wait them burn

And already fix my problem , it was walls portals and campfire too close to the geyser

Maybe ill drop the boar farm plan, hunting deers doing random things or exploring one can get a bunch of meat too , much more if u have 2 or 3 doggy wolfs following u