Force feeding it stimberries makes them starve sooner or later so when you force feed it remember to either have a feeding trough or have other types of berries in its inventory to eat when it does starve.
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.