After marching or a round of combat (after Break tests) Throt must pass a Leadership test or consume a single model from his own unit (owning player's choice). Yes, this means he might eat a Rat Ogre! Throt must still test even if he is pursuing a fleeing enemy. If Throt breaks and flees, he automatically fails his Ld test and eats a single model on the run! If he fails his test while fighting alone, Throt takes a single wound with no regeneration allowed.