"Oh, Hazel! This is where it comes from! I know now -- something very bad! Some terrible thing -- coming closer and closer."
He began to whimper with fear.
"What sort of thing -- what do you mean? I thought you said there was no danger?"
"I don't know what it is," answered Fiver wretchedly. "There isn't any danger here, at this moment. But it's coming -- it's coming. Oh, Hazel, look! The field! It's covered with blood!"
I love the book Watership Down by Richard Adams. And I love Fiver.