You should tame it wirh beer, but you can tame it with stimberries as well, at least on mobile. But stimberries will only do like 0,2% so it's not recommended. However, get some beer, place it in your hotbar, sneak up behind it and feed it the beer. If you get too close or in front of it, it will aggro on you. It's like taming the megaphitecus (big foot). You should use soothing balm as well, to speed up the process. Good luck taming your own cute poop-thrower!