Hazel was young and strong and a bit clever. His best friend, however, was a runt no one thought much of. But Hazel knew something about Fiver that made him respect the little fellow. Fiver was gifted with the Sight. He somehow could tell in advance what might be coming, and just then Fiver was terrified to the very marrow of his bones.
Rabbits such as Hazel and Fiver who live in the English countryside usually lead a pretty nice life. There are predators, sure. Foxes, hawks, and even stray dogs might grab an unwary rabbit. But rabbits are sociable creatures, living in cozy warrens underground, usually staying in the same place for years at a time. They eat together, play together, and follow a leader. And so it was at Sandleford warren.
Rabbits are usually rather biddable beings of habit so when Fiver, with Hazel backing him up, tries to convince their chief rabbit Threarah that death and disaster are coming—and soon—it’s a losing situation. After all, "The Threarah doesn't like anything he hasn't thought of for himself." His Owsla guards don’t believe them, either, and it is against the rules of the warren to leave it without permission. But they’re going to do it anyway.