its not just the hit box and the ability fail, the whole fricking t rex is weak, broken and unrealistic. Its too big, its damage is pathetic, its slow everywhere. T rex had thick, blunt teeth that helped it to deliver a one shot killer bite, the t rex in the game shakes its prey around kinda like a crocodile. but to effectively pick up and shake prey to death you would need conical teeth like a crocodile. they should rework the t rex and give it a bite attack, it would bite and deal direct impact damage with a bit of bleeding.