Tame ten of these phimomias and tame ten dung beetles. Force feed stim berries to phiomia and put dung beetles on wander. Load up the beetles with poop and BOOM infinite fertilizer and oil.
Stimberries remove a good chunk of food especially when you are feeding it so many stim berries it can empty a 5-star buffet and still be hungry so there's 2 ways to counteract this:
1: level Food
2: have berries in its inventory or nearby trough for it to eat after