When you tame a chocolate knuckle horse watch which attack you do. The rock throw does massive damage, but is really slow. The main attack has tremendous knockback and can be used to keep most things at bay whilst doing damage
I just went up to one of these things to admire it, then it punched me. I ran away, then looked back for a sec. Do you know what it did? It scooped a massive lump of crap from the ground and chucked it at me, and then the game said I was poisoned. WHAAAAAAAAT??!!!