Never ever let your carno loose on a parasaur when these guys are in the area!! These guys can throw mud/poop (can't really tell when it is covering my face) but if you tame them they can throw boulders.
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