When Littlefoot and the gang run away from Sharptooth after their sleep, Petrie is on top of Littlefoot's head. After the rest of the gang run into the crevice, we see Littlefoot being chased, and Petrie is not on his head. When Littlefoot does enter the crevice, Petrie is back on Littlefoot's head, but when Sharptooth breaks the crevice Petrie is not seen rolling down the hill with the gang. After Sharptooth is seen with its muzzle stuck in the now bigger crevice, Petrie reappears, but in the next shot, both Petrie and Ducky are gone. See more
Once upon this same earth, beneath this same sun, long before you, before the ape and the elephant, as well; before the wolf, the bison, the whale, before the mammoth and the mastodon, in the time of the dinosaurs. Now the dinosaurs were of two kinds. Some had flat teeth, and ate the leaves of trees, and some had sharp teeth for eating meat, and they preyed upon the leaf-eaters. Then it happened that the trees began to die. The mighty beasts who appeared to rule the earth, were, in...