The whole conceit of almost any animated fare starring animals is that they must be humanized.
Personification is the name of the game.
So, we have to suspend just as much disbelief as we do in watching other animated adventures. This adventure starts with a carnivorous dinosaur, horned and fierce, charging into the nesting ground of herbivores. Dinosaurs of various species scatter, and Aladar's egg is the only one not crushed from his mother's particular nest. We watch the egg change hands a few times, from an egg-sucking thief who drops it in the water, to the pterodactyl that drops it into the forest over an island far out into the sea. It's not hard to tell that the newest animation techniques are the only original element in this film.