The Land Before Time III (1995)

Littlefoot and his friends are constantly being bullied and browbeaten by three teenage dinosaurs: Hyp, a Hypsilophodon; Nod, a Nodosaurus; and Mutt, a Muttaburrasaurus. However, when a shower of meteorites (flying rocks) impacts near the Great Valley and causes a rock slide in the Mysterious Beyond, which blocks the water supply of the Great Valley, Hyp, Nod, and Mutt are no longer the biggest worry of Littlefoot and his friends. The increasing lack of water causes conflicts between the inhabitants of the Great Valley, who have lived in relative peace and harmony until this event.

When the interspecies situation becomes worse and worse, Littlefoot and the others set out to find water, whereby to keep the peace in the Great Valley. They are pursued by Hyp and his cohorts. When Littlefoot and the others find a small lake, the teenagers emerge and claim the waterhole for themselves, demanding that Littlefoot and the others keep silent about their discovery. Unwilling to comply, Littlefoot and the others flee from the bullies and during the following pursuit discover the reason for the blockage of the Great Valley’s water source.

Before they can return and tell the other Valley inhabitants the truth, a lightning strike ignites a wildfire that spreads rapidly through the dried Valley. The dinosaurs barely make it to safety at the edge of the Mysterious Beyond while the fire ravages their home. When the protagonists tell the other dinosaurs of their discovery of the water's being blocked in the Mysterious Beyond by the rock slide, disunity about what to do prevents the adult dinosaurs from doing anything to utilize this knowledge. Hyp, Mutt, and Nod set out into the Mysterious Beyond on their own to get to the water first....