Complex sentence: Buddy, in his excitement, leaves Bozo to sniff footprints that move away from him every time they are sniffed: this takes Bozo through a forest, dominated, as we find, by a brontosaurus, whose discovery frightens the dog into a run.
Split into simpler sentences: Buddy, in his excitement, leaves Bozo to sniff footprints that move away from him every time they are sniffed. This process takes Bozo through a forest, dominated, as we find, by a brontosaurus, whose discovery frightens the dog into a run.