Chapter Three sees the herd enter a dense forest; a number of baby Triceratops and Ankylosaurs disorientate and sicken themselves by eating mushrooms, causing another minor confrontation between the parents of the young animals. The tyrannosaur ambushes and kills a hadrosaur which wandered off from the main herd. The herd then prepares to cross a river teeming with crocodiles, which, similarly to the raptors, swarm their targets, killing a number of the crossing herbivores. Having crossed the river, the herd continues onwards; the tyrannosaur manages to ward off the crocodiles and crosses with its young in tow as well.